Gardening

All-America Selection Winners for 2025

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by Dawn Pettinelli, UConn Home & Garden Education Center

Each winter the All-America Selection winners are announced. This non-profit organization has established trial gardens throughout the United States and even as far north as Canada. New varieties, species or strains of annuals, vegetables and bedding plants are grown and judged on their performance. Those chosen as winners are outstanding plants and deserve a trial in your gardens as well.

This year’s national winners include 3 vegetables and 5 flowers. ‘Green Lightening’ is a very attractive, striped pattypan squash that tastes as good as it looks. The 5-inch or so fruits weigh in at 1 to 2 pounds and are ready to pick about 50 days after planting from seed. Judges marveled at the abundant yields on these 2 feet high, bushy plants.

Kohlrabi 'Konstance'
Kohlrabi ‘Konstance’ Image by all-americaselections.org

Kohlrabi ‘Konstance’ exudes a vibrant purple color as well as a sweet, crunchy texture. A curious but easy to grow and tasty addition to the vegetable garden, this kohlrabi matures at just 42 days from seed. Upright plants, about a foot high, produce round, purple 4 to 5-inch ‘bulbs’ that can be eaten fresh or served roasted or sauteed. Fruits are crack-resistant and plants resistant to several diseases.

Sweet pepper ‘Pick-N-Pop Yellow’ produces adorable, snack-size, extra sweet mini peppers. The pointed, conical fruits are about 4 inches long springing from compact 2-foot-tall plants. The prolific harvest begins about 65 days after transplanting. This variety shows great resistance to bacterial leaf spot.

One can never have too many dahlias and this year’s AAS winner, ‘Black Forest Ruby’ is a gem that can be started from seed. Since this variety is an octoploid (having 8 times the normal chromosome number) there is much variability in flower shape (ranging from single to double), plant height and structure. Most will be upright about 2 feet high with jet black foliage and ruby-red flowers. You can save tubers from the best-looking plants.

Dianthus ‘Interspecific Capitan™ Magnifica’ with its impressive bicolor pink and white frilly blooms looks as good in the garden as it does in a vase. Plus, the more you cut, the more blooms appear. Summer heat tolerance was impressive with the 2-inch flower heads also standing up to rain and cold. Plants range from 1 to 1 ½ feet tall and bloom all summer. Look for these vegetatively propagated plants at your local garden center.

Sunny sites will positively shimmy when planted with marigold Mango Tango. This rich red and primrose yellow bicolor blooms all summer long even without deadheading. Reaching only 8 to 10 inches in height makes it perfect for edging garden beds, containers or window boxes. Seeds can be started indoors and plants set out after the danger of frost has passed. Fertilize and water regularly for bountiful blooms.

Can there be too many petunias? ‘Petunia Shake™ Raspberry’ will convince you that there’s always room for one more. The fantastic flowers are reminiscent of a blended raspberry milkshake swirled with lemon-lime green sorbet. The 5 to 8 inch mounded plants can do front of the border duty, serve as groundcovers or billow over hanging baskets. Plants will bloom about 70 days from seed and hold up to heat and rain.

Snapdragon Double Shot Yellow-Red-Heart
Snapdragon‘DoubleShot™ Yellow Red Heart’Image by all-americaselections.org

I’ve never thought of snapdragons as fragrant, yet ‘DoubleShot™ Yellow Red Heart’ is said to have an amazing candy-like scent. Aside from this unusual trait, Yellow Red Heart promises to delight with vibrant yellow blossoms with a red throat that start early and continue through to a heavy frost. This snapdragon reaches about 20 inches in height with semi-double 1 to 1 ½ inch blooms produces all season long and able to tolerate light frosts.

Four regional 2025 Ornamental Winners well suited to the Northeast, include one petunia and 3 nasturtiums. If you’re looking for a vibrant pink petunia great for bedding and containers, try ‘Dekko™ Maxx™ Pink’. The vibrant pink 1 to 1 ½ inch starry blooms are produced all season long and hold up well to rain and heat.

Nasturtiums are top performers in garden beds and containers and are noted for their hummingbird attraction and edible leaves and flowers. New colors in the Baby series of nasturtiums to try out this year might be ‘Baby Gold’, ‘Baby Red’ and ‘Baby Yellow’. All can be grown from seed and start blooming about 50 days after sowing. Two-inch blooms cover compact 12-inch-high mounded plants. Colors are intense and plants stand up to drought, heat, cold, rain and wind. Considering our fluctuating summer weather, these are sure to do well both in the garden and in containers.

Check out these and past AAS winners. They were chosen because of their remarkable characteristics and they are sure to be winners in your yard too.

For your gardening questions, feel free to contact us, toll-free, at the UConn Home & Garden Education Center at (877) 486-6271, visit our website at www.homegarden.cahnr.uconn.edu or contact your local Cooperative Extension center.

 

 

‘Tis the Season for Holiday Plants

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By Dr. Matthew Lisy, UConn Adjunct Faculty

Yellow, white, and red poinsettias
The yellow Poinsettia on the left bottom corner really stands out from the traditional white. Photo by M. Lisy.

Once again, the winter holiday season is upon us!  I am sure I have said this before, but I never cease to be amazed at the seemingly endless varieties of holiday plants available.  This year, I planned on not buying any holiday plants, but one trip to two local greenhouses changed my mind immediately.  If one plant could exemplify the season, it would be the Poinsettia.  Although red and white Poinsettias have been the standard for many years, there are a lot of really neat colors available if you look hard enough.  One of my all-time favorites is orange.  I used to grow this variety when it first came out, and could never stock enough of them.  In the old days, you needed to set it next to a red one to tell the difference, but fast forward many years, and the orange is now much more intense and can stand alone in all its glory.

If I had to pick just one favorite Poinsettia, it would be the yellow.  It just looks so unusual and unlike anything else.  I first saw it years ago in small quantities in a big box store, but now they are much more common.  The regular white has a slight yellow tint to it, but there is a super bright white that looks as pure as freshly fallen snow.  Another new favorite is called “Christmas Mouse,” and has rounded leaves that resemble mouse ears in contrast to the normal pointed ones.  Of course, there are also Poinsettias that are actually spray painted with a plant-safe paint.  These plants usually also have glitter sprinkled onto them.  Even though these are artificial looking, they are beautiful works of art in their own right.

There are new varieties of cyclamen around too.  These are characterized by interestingly shaped flowers that are more open.  Some of the varieties even have the flowers turned upright.  The colors are amazing and range from dark maroon reds to almost neon pink.  Another plant I am really excited to see this year is the Amaryllis.  These have been around an extremely long time, but what changed is the number of places carrying many different varieties for sale.  I like when I can just buy the bulb and pot it up on my own.  This is less expensive and allows me to buy more varieties.  There are even some places selling the bulbs with a type of paint coating on them which is said to eliminates the need for watering.  I prefer a bulb in a pot as I think it looks more natural, but that is a matter of opinion.  What I have seen a lot less of this year is the Christmas Cactus.  While they are still around, their numbers are not nearly as plentiful as in the past.  The Amaryllis and Christmas cactus are the two plants you can keep long term.  They each have special care routines that you will need to follow to get them to bloom again the following year.  The Christmas cacti need a certain lighting (or darkness) period, and the Amaryllis need a dry dormant period.

Wherever you are going for the holidays, I suggest bringing one of these festive plants to the host as a gift.  There is nothing more cheerful than a brightly colored plant during the dark days of winter.  On that note, why not buy some for yourself and enjoy them all season?  Either way, I suggest you make the most of things with a nice new plant variety that you never had before.  There certainly are plenty from which to choose!

Cyclamen in flower and amaryllis bulbs
A beautiful new cyclamen variety and a few large Amaryllis bulbs. Photo by M. Lisy.

For your gardening questions, feel free to contact us, toll-free, at the UConn Home & Garden Education Center at (877) 486-6271, visit our website at www.ladybug.uconn.edu or contact your local Cooperative Extension center.

Holiday Gifts for Gardeners

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By Dawn Pettinelli, UConn Home & Garden Education Center

Vegetables in garden basket
Photo by Dawn Pettinelli

Let the holiday shopping begin! Compared to many family members and friends, buying a gift for the gardener in your life is a breeze. Lots of great possibilities and there’s always the option of a gift certificate to their favorite local garden center. These are just some of my personal suggestions.

With long, dark days settling in, reading is a great winter sport. I’m partial to whodunnits and might curl up with The Garden Party by Marty Wingate or The Garden Club Murder by Amy Patricia Meade. For non-fiction readers, especially those longing for greater self-sustainability, perhaps Small-Scale Homesteading by Michelle Bruhn and Stephanie Thurow might be an informative resource when just starting out. With all the calls we get about vegetable problems, two books by Susan Mulvihill; The Vegetable Garden Pest Handbook and The Vegetable Garden Problem Solver offer up lots of great photographs and least toxic controls for a myriad of insects, diseases and other pest problems. Of course, you can also call us at the Center for assistance.

Gardening magazines still offer excellent articles, advice and inspiration. A subscription to the Connecticut Gardener should be in every CT gardener’s mailbox or inbox. Fine Gardening is also CT based and fills our head with amazing plant information and truly inspiring gardens. I’ll also admit to a subscription to both Horticulture and The American Gardener.

Working in the garden often brings me to my knees and when that up close and personal, I find there are 2 tools always in my bucket. First is a Cobra head weeder, crafted in Wisconsin last I looked. This curved-headed tool can be used for weeding, thinning, making seed rows, digging in little seedlings and whatever other use you can come up with; a multi-tasking tool that is long-lasting and affordable. My deluxe soil knife features a smooth, sharp side and a serrated side with inch measurements, useful when planting. I find it does a nice job dispatching both annoying roots and jumping worms. When deployed on the ground, those larger, oval-shaped kneelers are tough and functional.

In my most recent issue of The American Gardener, there is a Craftsman 54-inch wood-handle action hoe that I would like to try so I can weed standing up. It works with a manual push-pull action but might be just the thing us older gardeners need.

While I have 2 different types of pruners that are great for stems from about a half to one inch in diameter, I can use help on the opposite extremes. Last year my sister got me a hand-held mini-chainsaw and it is wonderful for removing 1 to 3 inch or so stems or branches. It’s really made pruning much easier. On the other end of the spectrum, a pair of horticultural scissors with long blades treated to resist rust would be great for harvesting or deadheading cut flowers as well as indoor houseplant grooming.

For years, I have placed picked vegetables, whether peppers, carrots or chard into those attractive wicker baskets. Recently, I was given one of those garden trugs made out of recycled plastic that had holes on the bottom so I could gather up my harvest and then hose the soil off in the same container. There are several trugs on the market including those made of wood and wire mesh. They do make cleaning your vegetables a lot easier than doing it at the kitchen sink.

Gardeners go through gloves and despite what the ads say, if a pair lasts me a season, I’m lucky. They are always needed and appreciated, and you can’t go wrong gifting these to a gardener. For those with a lot of roses, consider purchasing a pair of rose gauntlets so their arms won’t get all scratched up when pruning.

Indoor gardeners might appreciate watering cans with long spouts that dispense water slowly, attractive cache pots, houseplant fertilizers, cork plant coasters or misters. Bird lovers may enjoy feeders, bird baths, bird houses or seed and suet for their fine-feathered friends.

There are many types of garden ornaments to present to your plant loving friends and family. Plus, tis the season for holiday plants – poinsettias, holiday cacti, amaryllis, frosty ferns are just a few of the selections that your gardener recipient might enjoy. With all these choices, the gardener on your gift list is sure to be pleased.

For your gardening questions, feel free to contact us, toll-free, at the UConn Home & Garden Education Center at (877) 486-6271, visit our website at www.homegarden.cahnr.uconn.edu or contact your local Cooperative Extension center.

Gorgeous Grasses

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By Dawn Pettinelli, UConn Home & Garden Education Center

Autumn shines a spotlight on ornamental grasses. With their rustling blades and fluffy seedheads they are star performers in late season gardens going head-to-head with asters, mums, Montauk daisies and boltonias. Plus, they are great in fresh or dried cut flower arrangements.

The huge selection of grass species available is great for gardens but makes selecting difficult. Heights range from a few inches to more than 6 feet; colors from deep green to chartreuse, burgundy to black. Solid or variegated?  Would a clump former, spreader, or self-seeder best fit your needs? Are seed heads important for fall and winter interest? Is this grass planted as an ornamental feature in your garden bed or landscape or are you looking for natives to support pollinators and perhaps serve as food for birds and others? Answers to these questions may guide you in grass selection.

Two favorite non-natives grown for their ornamental value are cultivars of Miscanthus and Pennisetum. While the miscanthus species has been listed as potentially invasive in CT, a number of attractive cultivars are available for purchase and can be striking if well positioned in the garden. Two outstanding selections are ‘Gracillimus’ and ‘Zebrinus’. The first has shimmering silver veined green leaves growing in graceful mounds. Reddish flower plumes emerge in fall changing to a light silvery hue. Plants are clump formers but can reach 6 feet or more in height.

‘Zebrinus’ is more commonly known as zebra grass for its definitive yellow and dark green striped foliage. This plant gets big over time. Mine is now 6 feet across and probably 10 feet high. I wrap a rope around it in the late summer to keep it upright through fall rains and winds. Stalks have been used quite effectively as a substitute for cornstalks around the lamppost.

Pennisetum alopecuroides
Pennisetum alopecuroides. Photo by dmp2024

My Pennisetum alopecuroides was grown from seed probably 20 years ago. These plants are absolutely gorgeous in the fall. Despite the many bottlebrush seed heads, I’ve never found a seedling. The fine, arching foliage resemble flowing water hence the common name, fountain grass. Cultivars of this graceful, flowing grass range from 18 inch ‘Piglet’ to 5 foot ‘Fox Trot’.

Native grasses are soaring in popularity and much easier to find at garden centers than they used to be. One switchgrass (Panicum virgatum) cultivar, ‘Heavy Metal’, is quite popular for its upright, striking blue-green foliage. If happy, it can reach 4 to 5 feet in height. The wheat-colored seed plumes are attractive to us during the gloomy winter months but also as a food source to a number of bird species.

Little bluestem (Schizachyrium scoparium) is a favorite also of humans and wildlife, including both birds and butterflies. This upright native grass is pretty ubiquitous along roadsides and in fields and meadows. New growth begins a clean blue green but, by the end of the growing season shifts to deep bronze and chestnut hues. This is a tough plant content in sandy soils and reaching about 2 feet in height. The silvery seed tuffs are retained for most of the winter. Little bluestem combines well with a number of perennial wildlings like rudbeckia, pearly everlasting, goldenrod and species of asters.

Chasmanthum latifolium
Chasmanthum latifolium. Photo by dmp2024

Also commonly found along roadsides, purple lovegrass (Eragrostis spectabilis) grows on sites from full sun to part shade. This is a very well-behaved grass in the Poa (bluegrass) family. It is native to eastern and central U.S. and produces those airy pink seedheads you might admire as you drive.

Northern sea oats (Chasmanthium latifolium) has very distinctive, but attractive seedheads. Native to the eastern and southern parts of the U.S., it is hardy from zone 5 to 8. Northern sea oats is a clump former with showy panicles of flowers in late summer that mature into wide, drooping seedheads. This grass likes moist but well-drained soils and is a larval plant for several species of butterflies as well as serving as a food source for several mammal and bird species.

Other native grasses worth investigating include side oats grama (Bouteloua curtipendula), big bluestem (Andropogon geradii) and prairie dropseed (Sporabolus heterolepsis). Check out both native and exotic ornamental grass offerings for their varied textures, colors, forms and flowers.

For more information on growing ornamental grasses or selection or for other gardening questions, contact the UCONN Home & Garden Education Center, toll-free, at (877) 486-6271, visit their web site at www.homegarden.cahnr.uconn.edu or contact your local Cooperative Extension Center.

I Want My Mum: A Fall Classic Through the Ages

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By Abigayle Ward, UConn Department of Plant Science & Landscape Architecture Graduate Student

A group of fall flowers mixed with mums in a container.
Orange, purple, and white mums used as “filler” in a potted arrangement at Wickham Park in Manchester, CT. Photo by Abigayle Ward.

With the arrival of fall, one popular bloom brings the brilliant colors of forest foliage to our doorstep: With flower colors coming in purple, red, orange, yellow, and more, chrysanthemums, or more simply, mums, have been a favorite for centuries. First domesticated in China over 3,000 years ago, mum roots, seedlings, and flower pedals were used as herbal remedies in traditional Chinese medicine.

For nearly 2,000 years, mums have been the symbol of fall in Chinese culture: The Double Ninth Festival, celebrated on the ninth day of the ninth lunar month, celebrates harvest, ancestors, and the beauty of autumn, with mums taking center stage as both decorations, accessories, and a floral wine.

First introduced to Europeans in the 1600s, mums quickly became a fall favorite. By the mid-1800s, the Victorians had written extensive literature on the interpretation and meaning of the color of each bloom. While some colors have carried the same meaning for thousands of years – such as white blooms symbolizing mourning – others took on entirely different meanings. While in China, a red mum represents fortune and luck, a Victorian would interpret this as a declaration of love.

Luckily, it seems many home gardeners in the United States nowadays are more concerned with the aesthetic appeal of their blooms than the meanings, so major misunderstandings are avoided. With several thousand cultivars available, mums come in many color combinations and growth habits. The National Chrysanthemum Society of the USA recognizes 13 different flower classes, ranging from 6-inch diameter flower balls with many layers of florets to smaller, 2-inch diameter flowers with only a single layer of a few petals. Some mums bloom early, in August, while others will bloom in October.

A row of potted mums for sale on a bench
Mums can be found for sale at garden centers starting in late summer. Photo by dmp2024

Further, some mums are annuals regardless of USDA hardiness zone, while others are perennials in zones 5-9. While so-called “florist mums” or “pot mums” are generally grown as annuals and will not survive winter frost, “garden mums” can survive winter frost if planted early enough in the growing season. If you wish to purchase a garden mum, but the mums are unmarked, a good way to tell the difference between florist and garden mums is to check for stolons near the base of the plant. Stolons, also known as “runners”, are shoots that grow out from the base of the mother plant. A daughter plant may have roots growing from the end of a stolon. If you want to purchase a perennial mum, check around the base of the stem for stolons – they will most likely be quite short but are a good sign that the plants may overwinter successfully. Alternatively, if you want to be sure you grow a permanent mum installation that comes back year-after-year, you can start some varieties of hardy garden mums from seed in late winter prior to planting out in spring. Get any mums you want to try overwintering in the ground as soon as possible. You can plant mums next year in spring or summertime to give them plenty of sunny weather to grow hearty root systems prior to the first winter frost of 2025. Mulch around your fall planted mums to help insulate their roots from frost.

Both annual and perennial mums benefit from at least 6 hours of direct sunlight per day. In Connecticut, a sunny spot to the south of your home would be ideal. Water mums thoroughly once the topsoil is dry but try not to wet the leaves or the flowers. Water left on the leaves or flowers can make mums prone to fungal diseases, which can make them unsightly or even kill them in severe cases. Towards the end of the season, especially between October and November, consider leaving the blooms on as long as possible to allow late-season pollinators to collect nectar.

Whether planted in a permanent flower garden or kept in a pot on the porch for fall, mums are an excellent addition of rich fall colors to any home gardener’s flower collection. Consider picking some up this season at your local garden center or plan on purchasing plants or seeds next year.

If you have a question on caring for your mums or for other gardening questions, contact the UCONN Home & Garden Education Center, toll-free, at (877) 486-6271, visit their web site at www.homegarden.cahnr.uconn.edu or contact your local Cooperative Extension Center.

Tips from UConn Floriculture Help Spruce Up Container Plantings

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By Dawn Pettinelli, UConn Home & Garden Education Center

Fall container plant selection at a greenhouse
Photo by dmp2024

As summer wanes and the cool breezes of autumn begin to roll into Connecticut, it’s the perfect time to refresh your container plantings. Shelley Durocher-Nesta, UConn Plant Science Floriculture Grower, says this summer’s rain and high temperatures have many of our container plantings looking a little ragged but fall presents a unique opportunity to infuse your outdoor spaces with rich colors, interesting textures, and seasonal charm that lasts well into the cooler months

By the end of summer, many annuals start to fade. To maintain a lush and lively look, she suggests replacing them with plants that thrive in cooler weather. A top candidate for fall plantings, both containerized and inground are mums, obviously. They offer an explosion of color in shades of yellow, bronze, pink and reds. Asters are runner’s up, flashing their cooler shades of purples and pinks.

Ornamental cabbages and kale are leafy plants bringing texture and interest to plantings, often with their lacy ruffled edges. Hues range from deep purple to violet and from white to green, some being two-toned.

Recently, pansies and violas have been showing up as fall bloomers. These delicate flowers add a pop of color and laugh off light frosts. Pansies, with their cheerful ‘faces’ are particularly popular and come in a wide range of colors. Ornamental peppers in shades of yellow, purple red and orange are also available often in 4-inch pots

Depending on your color scheme and container size, two other great fall accompaniments are heuchera (coral bells) with their stunning foliage in a myriad of colors, and sedums that can be used either for their unique fleshy foliage or pollinator-friendly blooms.

Don’t forget ornamental grasses for their attractive seedheads and whispering foliage. If pinched for room, a few stalks of dried grasses or wheat can give your containers a rustic, harvest-time feel.

Before purchasing new plants, access the plants presently in your containers. Groom, deadhead and cut back leggy annuals like petunias and verbena. If you have summer plants that are still thriving, you can repurpose them by combining them with fall plants in the same container for a mixed-season look. However, often one finds that their summer layout doesn’t work as well with new plants. Don’t hesitate to replace staid offerings. Durocher-Nesta, agrees saying that switching out her summer planters that are getting a little tired by the end of August is a joy.

Container full of fall annuals
Photo by dmp2024

Refresh the soil in containers before planting new fall selections. Summer plants have depleted the nutrients, so replacing the top few inches with fresh potting mix can get fall plants off to a better start. If your container is large and you can’t replace all the soil, mix in some compost or at least a slow-release fertilizer, as directed on the package, to rejuvenate it,

Consider elevating some containers on stands or steps to create varying heights. Grouping containers of different sizes together on your porch or patio can also add depth and visual interest.

One of the joys of fall container gardening is the chance to play with a different color palette. While summer is about bright, vibrant colors, fall offers a more subdued, warm earthy palette. Think deep purples, burnt oranges, and rich reds, balanced with greens and whites.

As the weather cools, plants will need less water but check regularly. Container plants can dry out quickly especially on sunny fall days. Stick a finger in and add water when the top inch of potting media feels dry.

Regularly deadhead spent flowers and remove any yellowing leaves to keep your containers looking tidy and to encourage continued blooming. As frost becomes more likely, be prepared to cover sensitive plants or bring containers indoors on particularly cold nights.

In addition to the plants, fall-themed accents can enhance the seasonal appeal of your containers. Consider adding small pumpkins, gourds, or decorative squash to the mix. For a touch of whimsy, add seasonal decorations like mini scarecrows, wooden sunflowers or decorative berries.

Sprucing up your container plantings for fall in Connecticut can bring a fresh, seasonal look to your outdoor spaces. With the right plant choices, thoughtful arrangement, and a few seasonal accents, your containers can remain a focal point of beauty and interest well into the cooler months. Durocher-Nesta shares thoughts about her favorite fall flower: “Bright and fresh mums bring a smile to my face during a time of year when falling leaves and shorter days mean winter is coming.  They’re one last Hoorah! for the growing season.”

If you have questions on container plantings or on any other home or garden topic, contact the UCONN Home & Garden Education Center, toll-free, at (877) 486-6271, visit their web site at www.homegarden.cahnr.uconn.edu or contact your local Cooperative Extension Center.

Fall is a Fabulous Time to Plant!

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By Heather Zidack, UConn Home & Garden Education Center

Evergreens for sale at a nursery
Photo by H. Zidack

There’s no doubt that spring planting is exciting. The instant gratification that comes with putting in our new gardens and seeing flowers and greenery right away is unmatched.  Late season planting is a different animal altogether. There’s a slower pace, less pressure for perfection, and a promise of beauty next season – leaving us the chance to take up other projects in the spring.

Many gardeners will start planting hardy bulbs this fall, but you can do so much more! Planting trees, shrubs, and perennials in the late summer/early fall provides enough time for plants to get established without the heat and drought stresses of summer. New plants installed in the fall have enough time to develop healthy roots and settle in before winter. Allow at least 6 weeks (about 1 and a half months) before the first hard frost to ensure strong establishment. It’s less stressful for plants, but also easier for gardeners to plant, water, and support our gardens when the weather is a bit cooler.

Your fall planted perennials, trees and shrubs will also flower “on time” next spring. Whether you've noticed it or not, flowering plants that we buy during the growing season are sometimes manipulated to bloom when you see them on the shelf. And while most plants will settle into their natural flowering cycle after their first year, planting in the fall ensures that you are starting the season with a bed that will bloom as nature intended.

Watering a shrub after planting
Photo by dmp2024

Keep a keen eye out for garden centers that may be trying to sell down their stock, so they don’t have to keep it during the winter. Plants may look a little more weathered, and past their prime. But don’t fret! If you shop smart, you can find some great plants for fantastic prices.

Shop for plants that have a nice form and strong root ball. Avoid plants that have apparent injury to trunks or branches. Old insect feeding damage, off colored leaves, or some drought damage may be recoverable. Remember that perennials will be cut back before their next flush, and deciduous shrubs will drop leaves and need pruning regardless of what they may look like right now. Never buy a plant that seems to have issues that you cannot identify, regardless of the bargain. If there are plants that you want that are unavailable, leave space for them to be planted next season.

The lower stress environmental conditions also make it a suitable time to transplant or divide plants that bloom in the spring or summer. When digging plants for transplanting, make sure to dig wide and deep to get as much of the root ball as possible. Division is a common practice with perennials and is as simple as driving a shovel through the center of the plant and digging out half of it to put somewhere else. Larger plants can be divided multiple times.

While it may seem like a promising idea to help push your plants along with some robust growth, fertilizing is not recommended in the fall. Pushing tender growth too close to chilly weather can leave the plant vulnerable to environmental damage, loss of shoots, and possibly even loss of flowers next season. Maintain them with adequate watering and supportive care. Provide good sanitation by removing and disposing of any questionable leaves that fall in your space, especially those from newly installed plants.

Planting in the fall and supporting your fall garden will help you lay a foundation for a successful spring.

If you have questions on fall gardening or on other gardening topics, feel free to contact us, toll-free, at the UConn Home & Garden Education Center at (877) 486-6271, visit our website at www.homegarden.cahnr.uconn.edu or contact your local Cooperative Extension center.

 

End of Season Strawberry Renovation

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By Dawn Pettinelli, UConn Home & Garden Education Center

Strawberry row
Strawberries before renovation at the end of the season. Photos by dmp2024

Strawberry row after renovation
Strawberries after renovation at the end of the season. Photos by dmp2024

So, you decided to grow some strawberries this year. You carefully prepared the bed and have enjoyed your first crop. Now you are wondering what to do to keep your strawberry bed healthy and productive. In part, the care after harvest depends on whether you are growing June bearing or day neutral (everbearing) varieties and what kind of row systems you have them planted in.

June bearing strawberries are most commonly grown in what is known as the matted row system. Mother plants are set 18 to 24 inches apart in 3 to 4 1/2 foot rows and runners are allowed to root anywhere within the row. This system is usually the easiest to maintain. Typically, at the end of the third growing season both plant quality and fruit quantity start to decrease and the whole bed is dug up and replanted with new disease-free strawberry plants. Try to incorporate this into your garden rotation plan to reduce disease problems.

June bearers can also be grown in single rows composed of different aged plants with the original plants set about a foot apart. A second row is started with first year runners and set 18 inches from the initial planting. Use only the first or second daughter plants produced along the runners because they are the most vigorous and productive. The rest are usually discarded.

The next year a third row is made again using the first one or two daughter plants and once more surplus runners and plants are removed. After the original mother plants have produced fruit for about 3 years, they are generally replaced with new, disease-free stock and the cycle continues. This way one always has a row or two of strawberries in production. Ideally the row with the new strawberry plants should be located on a section of the garden where strawberries haven’t been grown for 3 to 5 years. This isn’t always possible in small yards, which is why it is important to purchase certified virus free stock.

After year two when June bearing strawberries have finished producing their crop, it is time to renovate. According to Evan Lentz, UConn Fruit Specialist and Assistant Extension Educator, renovating your June-bearing strawberries is one of the best ways to maximize your annual production, reduce disease instance, and maintain an orderly planting. Proper renovation ensures that you set yourself up for success in the following year and allows you to extend the life and productivity of this semi-perennial crop. This is doubly important for individuals producing fruit in an organic or no-spray system.

This can be done sometime in July through August. Lentz suggests starting by either mowing or clipping with hand trimmers all the foliage about 2 inches or so above the crowns. Next, go through the bed removing all weeds, and weak and extra strawberry plants and dead or dying leaves. Thin to space plants at least 10 to 12 inches apart and cultivate around these remaining plants.

Now is the time to fertilize your strawberries whether beds are renovated or not. Lentz recommends working in about 3 to 4 pounds of 10-10-10 or its organic equivalent per 100 square feet. Lightly scratch the fertilizer into the soil. Brush or rinse any fertilizer off leaves at the salts will injure them.

Day neutrals, such as ‘Tristar’, ‘Seascape’ and ‘Mara des Bois’ produce a fairly decent size crop in June and continue forming occasional berries until frost. Unlike June bearers which develop fruit buds in late summer and early fall, the ever bearers have the ability to form fruit buds throughout the summer. An advantage to growing day neutrals is you will still get strawberries even if a late spring frost kills their initial fruit buds.

In general, day neutrals are grown for 2 or 3 years and then a new batch of strawberries is planted. The day neutrals produce far fewer runners than the June bearers. The new daughter plants should all be removed although they can be transplanted into another area if desired. Plants are usually set one foot apart in single rows about 18 inches wide.

According to Lentz, all strawberries require at least an inch of water per week for vigorous growth. If dry weather sets in, plan on irrigating plants, especially those just renovated. Use a mulch of pine needles, straw or wood shavings to conserve moisture, keep weeds down and berries off the soil. Since strawberries are shallow rooted, it is important to keep weeds under control.

It does take a little time to maintain a strawberry bed but the luxury of picking your own berries for strawberry shortcake, jam or fresh eating makes it all worthwhile. If you have questions about growing strawberries or on any other home or garden topic, contact the UCONN Home & Garden Education Center, toll-free, at (877) 486-6271, visit their web site at www.homegarden.cahnr.uconn.edu or contact your local Cooperative Extension Center.

Spectacular Sedums: Your New Favorite Groundcover

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By Abigayle Ward, UConn Dept. of Plant Science & LA Graduate Student

A bee on a cluster of pink sedum flowers
Sedums are very attractive to pollinators. Photo by dmp2024

With varieties native to North America, tolerance to frigid temperatures down to minus 40 degrees F, and nearly 500 species described, sedums subvert all expectations of a succulent. Also known as stonecrop, sedums have been a garden favorite since the 17th century, and it’s easy to see why. Their visual interest and tolerance of harsh growing conditions make them well-suited as groundcover for the landscaper with an artistic eye.

You can purchase either tall or creeping varieties of sedums. Also known as ‘clumping’ varieties, tall sedum varieties can grow up to 3 feet tall although many will only grow to 1 foot tall or less. Tall, top-heavy varieties can be prone to falling or flopping over especially if overfertilized or if they receive too much water. They are well-behaved perennials that are clump formers, and thus can be useful as focal points in garden beds. Alternatively, creeping varieties of sedums grow from 2 to about 6 inches tall.  These creeping varieties will spread a few feet in every direction but do so very slowly. If you wish to fill your bed with sedums, you can stick vegetative cuttings throughout the area you want them to grow. Keep moderately moist until well rooted. Once they root, they will usually fill out your bed fairly rapidly.

With such a large variety of leaf shapes and sizes, interesting bed textures can also be created with sedums. Some varieties have large, broad, spoon-shaped leaves while others have many short, pointed leaves surrounding the main stem. You may wish to combine different textures together into one bed to make a wild, visually striking design, or try taking advantage of certain textures for specific locations in the bed. For example, you could choose short creeping varieties with small leaves for bed edges, and select slightly taller creeping varieties with larger, broader leaves to build up to the bed’s focal point.

Variegated sedum with yellow flowers
Some sedums come in a variety of leaf shapes and colors. Photo by dmp2024

Sedums come in a smattering of delightful color combinations from electric green to deep purple, red to teal; there’s a color of sedum for any design. Many keep their color year-round, and produce delightful bunches of tiny, colorful flowers between summer and fall, depending on the species or cultivar. The magenta, yellow, and lilac-colored petals attract pollinators in great numbers, especially between August and September here in Connecticut. The flowers persist until wintertime, when they dry out and turn brown as the plant goes dormant. While you may choose to remove the flowers before the winter snowfall, you can also leave them on the plant to add some color contrast in your garden as the brown stalks are surrounded with snow. Additionally, leaving the dried flowers on the plants may help creeping varieties spread, as the tiny seeds fall to the ground and germinate come springtime.

While generally very tolerant of adverse growth conditions, sedums do best in sunny spots with well-drained soil. Luckily for those of us in Connecticut, many of our soils are well-drained. Sedums require little nutrients to thrive and typically are happy with just a spring application of an all-purpose garden fertilizer. Since sedums go dormant in the winter, no fertilizer should be applied later in the year. While other groundcover plants may need water in a drought, sedums, like most succulents, can go extended periods of time without supplemental irrigation. To top it off, their foliage is bitter, and thus unlikely to be damaged by grazing wildlife. The limited maintenance requirements of sedums make them attractive candidates for both lawn alternatives and green roofs alike.

While resistant to consumption by mammalian wildlife, the juicy sedum leaves are sometimes appealing to hungry aphids and thrips. To manage aphids and other sap-sucking insects, you can simply spray sedums with water to knock off the pests – just be mindful of overwatering, as the sedums may rot. Alternatively, you can try attracting ladybugs and other aphid predators to your sedums by planting marigolds, dill and other predator attracting plants nearby. The ladybugs will partake in the pollen and snack on the sapsuckers. Avoid spraying insecticides, as they will kill both pests and beneficial insects, including pollinators. Leaving leaf litter in your garden over the winter gives a place for ladybugs to hibernate. Come spring, newly hatched ladybug larvae will be on the hunt for a meal, ready to vigilantly defend your sedums from attacking aphids.

Your next groundcover selection can be both visually appealing and low maintenance. If you’re looking to update your groundcover, consider picking up some sedums at your local garden center in the spring or summer.

If you have questions on growing sedums or on other gardening topics, feel free to contact us, toll-free, at the UConn Home & Garden Education Center at (877) 486-6271, visit our website at www.homegarden.cahnr.uconn.edu or contact your local Cooperative Extension center.

Flock to Phlox

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By Dawn Pettinelli, UConn Home & Garden Education Center

Purple phlox flowers
Purple phlox in bloom. Photo by dmp2024

About now, many of our perennial gardens are looking a bit lackluster. Early summer bloomers have fizzled out and autumn charmers like asters and mums have yet to pop. Garden phlox (P. paniculata) to the rescue!

Annual and perennial phlox comprised about 70 different species, many of which are native to North America. Their habitats range from woodlands to meadow and their growth habits from low and mounded to tall and upright. All have clusters of tubular flowers that are exceptionally attractive to hummingbirds and hummingbird moths along with bees and butterflies.

There are an outstanding number of garden worthy cultivars. My favorite is ‘David’, a white, powdery mildew resistant variety that grows to about 4 feet with loads of slightly fragrant blooms. I have it planted in my white garden and this sturdy, upright plant has come back year after year with virtually no problems.

UConn Plant Science & Landscape Architecture professor, Dr. Jessica Lubell-Brand noted phlox ‘Jeana’, the 2024 Perennial Plant Association’s Perennial Plant of the Year, is treasured for its long blooming period as well as its butterfly luring abilities. Plants can reach up to 5 feet in height and its more loose and wild appearance works well in cottage gardens featuring attractive pink flowers and decent powdery mildew resistance.

Sometimes shorter varieties are a better fit and if that is the case, for your beds look to ‘Coral Crème Drop’, which according to Dr. Lubell are part of the Candy Store series. She raves about their vibrant coral blossoms with their August feel. Another top garden candidate in her book is ‘Glamour Girl’, also with hot coral blooms as well as good resistance to powdery mildew.

A number of garden phlox sport distinctive eyes. ‘Bright Eyes’, as the name implies is a delicate pale pink with a bright crimson eye while ‘Laura’ is a mildew resistant, royal purple variety with a white eye. Both grow to about 3 feet in height.

Many gardeners find these phlox indispensable for August into September color in the perennial garden. They are tough, colorful, vigorous plants that are hardy and relatively long-lived. They make excellent background plants for narrow borders and can bridge the gap between varied sized perennial plantings. Garden phlox come in a wide range of hot and cool colors ranging from white and light pinks, to purples, reds, oranges and magenta.

For healthy, vigorous plants, they should be grown in full sun to part shade. Phlox enjoy a moderately fertile soil with a pH in the 6s. While established plants are fairly drought tolerant, larger and more numerous flower heads are produced when adequate moisture is supplied. They grow at a moderate rate so division every 3 to 4 years is usually sufficient.

Both to encourage sizable blooms as well as to reduce the incidence of phlox’s number one nemesis, powdery mildew, Dr. Lubell recommends reducing the number of stalks early in the growing season to 6 to 8 per plant. This provides better air circulation to plants.

Powdery mildew on phlox leaves
Powdery mildew on phlox leaves. Photo by dmp2024

Powdery mildew is a fungus disease that is more widespread during humid, wet summers. It typically does not kill plants, but they look awful with their leaves covered with what looks like white powder. Two options for dealing with this disease according to Dr. Lubell, are to select resistant phlox cultivars or to pre-emptively spray with a least toxic substance like potassium bicarbonate or your fungicide of choice. As stems die or get killed by frost, be sure to remove them from the garden and put in the trash, not the compost pile.

Insects are not usually a problem but during dry, hot summers, spider mites may attack plants. Usually, a strong blast from the hose will knock them off. This may need to be repeated several times if dry weather persists.

A key gardening practice when growing phlox is dead-heading, or removal of spent flower heads. Garden phlox produce a lot of seeds and if left to fall to the ground and germinate, vigorous plants will most likely produce blooms in that undesirable, muted magenta color. Often these seedlings crowd out the more desirable cultivars that were intentionally purchased.

Not only are garden phlox cultivars pretty spectacular on their own but Dr. Lubell says they pair nicely with a variety of other perennials including lilies, yarrow, ballon flower, daylilies, bee balm as well as numerous annuals.

If you have questions on garden phlox or on any other gardening questions, feel free to contact us, toll-free, at the UConn Home & Garden Education Center at (877) 486-6271, visit our website at www.homegarden.cahnr.uconn.edu