Seasons

Cranberries, A Symbol of Holiday Cheer

By Nick Goltz, UConn Plant Diagnostic Lab

Workers harvesting cranberries in a flooded bog using a conveyor system.
Keith Weller, USDA Agricultural Research Service, Bugwood.org

Each holiday season, a wave of bright red cranberries appears on Instagram feeds, Pinterest boards, and tables across the nation in the form of sauces, desserts, drinks, and decorations. Beyond their seasonal fame however, these tart red berries play a major role in U.S. agriculture and culture. 

Let’s start with some numbers. The USDA estimated the 2024 U.S. cranberry harvest at about 8.24 million barrels, roughly 824 million pounds of fruit. Here in the U.S., the cranberry king is Wisconsin, producing nearly 4.9 million barrels, around 60% of the national total. In second place is the historical cranberry producer, Massachusetts, with approximately 2.2 million barrels produced in 2024. The top agricultural crop in the state, Massachusetts’ cranberry crop alone is valued at $73.4 million, supporting over 6,400 jobs and generating $1.7 billion in annual economic activity. Cranberries are so important for Massachusetts, in fact, that they are the state fruit and cranberry red is the state color.  

Cranberries, known scientifically as Vaccinium macrocarpon, are native to North America and are a close relative of blueberries. Compared with blueberries however, cranberry plants tend to be smaller, low to the ground and vine-like. The vines require acidic soil (pH 4.0–5.5), a reasonably cool growing season, and abundant fresh water. If these conditions can be emulated at home, cranberries can make an attractive edible ground cover. They perform well when planted alongside plants such as conifers and rhododendron, provided they are given plenty of water and appropriate fertilizer for acid-loving plants.  

For commercial production, cranberries thrive in uniquely engineered wetland environments - bogs built atop beds of sand, peat, gravel, and clay. The annual commercial production cycle of cranberries begins with winter flooding, which forms protective ice that shields the vines and prepares the surface for sanding, which stimulates spring growth. As temperatures rise in spring, bogs are drained, and bees pollinate the blossoms. Summer is devoted to irrigation and monitoring, followed by harvest from mid-September through early November, before the cycle repeats with winter flooding and freezing.  

Cranberry growers will typically harvest their crop one of two ways: through wet harvesting or dry harvesting. Wet harvesting describes the process where bogs are flooded to allow berries to float to the surface before being netted and loaded into equipment for cleaning and processing. This harvesting technique is the most popular, but requires proper equipment and careful planning. Dry harvesting, the process of using mechanical pickers that comb berries into conveyers, is an approach primarily used for fresh markets. More fruit are left on the vine with this approach, but the collected berries for fresh market can be sold at high prices and dry harvesting allows growers without the means to flood and drain their bogs on a schedule to grow cranberries. 

Cranberries are deeply embedded in holiday traditions, thanks to their seasonal harvest, festive red color, and historical use. For more than 12,000 years, they’ve been utilized by Indigenous communities, especially the Wampanoag People, for food, medicine, dye, and winter preservation. The cranberries collected by hand in the bogs of southern Massachusetts were both eaten fresh and dried for shelf stability, then eaten as-is later in the winter or mixed with dried meats and fat to make pemmican, a hearty winter staple.  

European settlers in New England quickly adopted the appreciation of cranberries, integrating them into winter celebrations. By the 18th and 19th centuries, cranberry sauces, relishes, and baked goods were staples of Christmas feasts. Their vibrant red hue also made them popular in holiday crafts such as cranberry-popcorn garlands or wreath embellishments.  

U.S. cranberries reach peak consumption during the holidays. Though 95% of cranberries are processed into juice, sauce, or dried fruit, fresh cranberries remain a holiday staple, used in everything from stuffing and pies to cocktails and décor. Around 400 million pounds are eaten annually, with an estimated 20% consumed during Thanksgiving week, about 80 million pounds. With per-capita annual consumption averaging 2.3 pounds, mostly in juice or processed form, cranberries rank second among berries consumed in the U.S. after strawberries! 

Cranberries exemplify a convergence of historical tradition and the advances of modern agricultural practices. They support regional economies, sustain traditional farming techniques, and bring seasonal joy to millions. As you gather with loved ones this holiday season, enjoy an extra serving of these tart crimson berries and remember that food isn’t just sustenance, it’s heritage, celebration, and connection. 

The UConn Home Garden Education Office supports UConn Extension’s mission by providing answers you can trust with research-based information and resources. For gardening questions, contact us toll-free at (877) 486-6271, visit our website at homegarden.cahnr.uconn.edu, or reach out to your local UConn Extension Center at extension.uconn.edu/locations.  

This article was published in the Hartford Courant December 27, 2025

Gifts for the Gardener on Your List

By Heather Zidack, UConn Home Garden Education Office

A decorated Christmas tree with white lights and various ornaments, surrounded by wrapped presents on a red tree skirt.
Photo by H. Zidack, UConn Home Garden Education Office

If you have a gardener in your life, last minute holiday shopping can be tough. Each year, we provide a list of suggestions that might help you as you’re shopping. For 2025, we are considering gardener comfort and adaptability.

Gardening Gloves

While it seems like a trivial gift and your gardener may already have a good pair, gardening gloves are a great gift! It’s always nice to have an extra pair in case your hands get wet working in muddy soil, or if you manage to lose them. Our gloves wear over time, and can thin, stretch, and decline in quality as seasons change. While any pair may be helpful as a backup pair, you might get bonus points for finding your gardener’s favorite brand or style. These are readily available in hardware stores or year-round garden centers.

UV Protective Clothing

With the improvement of UV protective textiles, gardeners can find them in all sorts of forms. UV shirts, gloves/sleeves, and even hats are available to help your gardener stay protected from the sun. This is great for anyone who loves being outdoors, but especially those who may have extra sensitivities to sunlight. While not a direct substitute for sunscreen, they can help provide a little extra protection. I find that these often are best found online, though I have seen individual items at independent garden centers, sporting stores, and gift shops throughout the state.

Cooling Towels

Athletic cooling towels are meant to help keep you cool. Soak them in cool water, wring out the excess and wear as a scarf or drape over your shoulders. The evaporative cooling from the towel helps you stay cool even during the warmest summer days. While they’re usually found with the sports gear, your gardener will love them, too!

Waterproof Shoes

Nobody likes wet feet, especially in the garden. Help the gardener you love stay dry by gifting them with a pair of waterproof shoes! These come in many forms such as rubber rain boots, rubber clogs, or even waterproof sneakers. They can be found at sporting goods stores, shoe stores, or online.

Shop Smart

There are many gifts beyond these recommendations that may suit the gardener in your life. As we approach the last-minute shopping season, keep these tips in mind to help you find the perfect gift.  

Look carefully at the label of any seed mixes, seed bombs, or other plantable gifts, especially if you are intending to gift native seeds. Many of these mixes sold across the country may provide plants native to North America, but not necessarily native to our region. The label provides a percentage breakdown of every species of seed included. Cross reference to ensure that they are native to our region.  

Purchase durable tools and equipment over novelty items. Give your gardener gifts that they will be able to use for years to come. While gloves with claws to help you dig are fun and unique, a good trowel will stay part of your gardener’s arsenal for many years.  

Consider your gardener’s interests to help guide your gifting. If your loved one plants more flowers than vegetables, a garden hod might not be the right fit for them. If they hate weeding, a gift to make the chore easier might be a great fit! Think about the ways the person you’re gifting likes to spend time in their garden and tailor your gift to them.  

Don’t rule out experiential gifts just because it’s winter. Gardeners who wish to continue to learn and spend time with like-minded green thumbs may enjoy a workshop, class, or conference. Many regional garden shows (including the CT Flower & Garden Show) take place during the winter. Local garden clubs, libraries, or garden centers may also offer educational workshops that you could purchase tickets for in advance.  

Shop smart. While we can’t recommend any brands or specific places to shop, use your smart consumer skills when looking for these or any other gifts this season. Reading reviews, using trusted retailers, and balancing quality with price will help you verify that these gifts will impress.  

If you’re shopping last minute for that gardener in your life, remember that it doesn’t have to be stressful! Keep comfort, adaptability, and their unique interests in mind for a gift that’s sure to please!  

 The UConn Home & Garden Education Center supports UConn Extension’s mission by providing answers you can trust with research-based information and resources. For gardening questions, contact us toll-free at (877) 486-6271, visit our website at homegarden.cahnr.uconn.edu, or reach out to your local UConn Extension Center at extension.uconn.edu/locations. 

This article was published in the Hartford Courant December 20, 2025

Highlighting Connecticut’s Winter Cheer: Common Witch Hazel

By Holly McNamara, UConn Plant Diagnostic Lab

Branches of witch hazel with clusters of yellow, ribbon-like flowers against a clear blue sky and autumn foliage.
Photo by Pamm Cooper, UConn Home Garden Education Office

Connecticut’s native species of Witch Hazel, Hamamelis virginiana, is a remarkably unique woody ornamental that can be found as a large shrub or small tree. It comes to the rescue this time of year as the leaves continue to drop and our surroundings become starved of color. Its foliage in autumn is a showstopping yellow.  

Hamamelis virginiana can grow between 10 and 20 feet tall and is often nearly just as wide as it is tall. In ideal conditions, some can even grow as large as 30 feet tall. It has a loose and somewhat open, irregular rounded shape and is very attractive in landscaping when used as hedge rows, woodland edge planting, or along a pond or river. It’s the last plant to come into bloom each year in the Northeast, blooming from October to December. The bloom coincides with its flashy fall foliage, making it one of the most eye-catching specimens of the winter landscape.  

The blooms are bright yellow with spidery, ribbon-like petals and have a pleasant citrusy fragrance. They are clustered tightly around the branches, and the petals curl up protectively during cold spells. A few cut branches in a vase will be sure to perfume and brighten up your home during the dreary winter months. Its late flowers attract certain species of flies, bees, gnats, and cold-tolerant moths. These insects are a food source for native songbirds such as kinglets, chickadees, and titmice.  

The medicinal qualities of the Common Witch Hazel are world renowned and have been utilized for centuries. Its anti-inflammatory properties serve as a soothing remedy for bruises, itches, sunburns, acne, and small wounds. In fact, Common Witch Hazel extract is one of the only medicinal plants approved by the FDA as a nonprescription drug. Always consult with a medical professional before incorporating the use of medicinal plants. It's worth noting that there have been several Witch Hazel processing plants in Connecticut, starting in the 19th Century. To this day, most of the world’s Witch Hazel extracts are still produced in East Hampton, Connecticut. 

Consider planting a Common Witch Hazel or two in your yard, mixed with hollies, viburnums, and dogwoods for some late-season cheer. Common Witch Hazel will grow in a variety of conditions, from moist to dry, and shaded to sunny. Flowers are most abundant when planted in full sun. It prefers acidic, nutrient-rich, well-draining soil. It’s quite hardy, growing in zones 4 through 8, and has very little trouble with pests or diseases. After establishment, they are virtually care-free. The only maintenance of note is periodic pruning to remove suckers if a controlled shape is desired. 

Although it is a slow growing plant, it is worth the wait when it bursts into bloom. With so much going for it, this is a plant that deserves greater consideration for use in ornamental landscapes and yards. 

The UConn Home & Garden Education Center supports UConn Extension’s mission by providing answers you can trust with research-based information and resources. For gardening questions, contact us toll-free at (877) 486-6271, visit our website at homegarden.cahnr.uconn.edu, or reach out to your local UConn Extension center at extension.uconn.edu/locations.

This article was published in the Hartford Courant November 29, 2025

We Asked Gardening Pros If You Should Rake Leaves From Garden Beds—And They All Agreed

We Asked Gardening Pros If You Should Rake Leaves From Garden Beds—And They All Agreed

The Spruce – Heather Zidack and other professionals give their insight on raking leaves from your garden beds.

Why Bees and Wasps Really Crash Your Late Summer Picnic!

By Heather Zidack, UConn Home & Garden Education Center

Did you notice a few unwelcome guests trying to steal a sip from your soda can at your Labor Day picnics last weekend? In late August/Early September, bees and wasps are highly visible, more persistent, and at their peak populations in social hives. We get a lot of calls this time of year asking what can be done to remove them from shared spaces. 

A yellowjacket flying low to the ground
A Yellowjacket. Photo by Heather Zidack, UConn Home & Garden Education Center

Thousands of described species are spread across 7 taxonomic families, worldwide. Eusocial species, like honeybees and paper wasps, have complex social structures that contribute to the overall survival of the hive. Meanwhile, a large majority of species are solitary and may live close to similar species but don't work together when it comes to provisioning resources or defending a territory. Diets range from carnivorous to herbivorous. However, most of them have developed a relationship with flowering plants in some capacity. Some are specialists, needing specific flowers for various resources, while others are generalists. Flowers have co-evolved with these insects so that they may benefit from the relationship via pollen distribution. Only those that help to move pollen are considered pollinators, though many may feed on floral resources. Entomologists dedicate their entire careers to understanding these insects and their complex relationships with the larger world. 

So why do they bother us around Labor Day but not so much during other summer picnics? A lot of it has to do with life cycles. By August, a hive has had a significant amount of time to establish. In spring, a queen will start a nest the size of a quarter. They aren’t on our mind so we’re not on the lookout. By now, some of those social nests can be the size of a basketball, or larger, with thousands of insects working for the good of the hive. At the same time, we're in the season when bees and wasps are on the lookout for sweet, sugary energy sources as their natural floral resources start to become scarce with the change of the seasons. Some become more protective of territory, trying to protect local resources and inadvertently mistake your sodas, fruit, and sweet picnic goodies as their next opportunity. Keeping drinks and food covered at picnics at this time of year is highly recommended to avoid attracting bees and wasps. If you grow fruit trees or berries, clean up any dropped fruit that could also attract these sugar fiends.  

In general terms, the easiest management strategy is to avoid the area, if possible. Hives built in low traffic areas can plausibly be left for the season, since workers will die out with colder weather. The only one to overwinter is the queen, and she will usually overwinter in leaf litter or plant material at ground level. In addition, wasps are not going to re-use their hives. The new queen will start fresh with her own nest, and her own colony come springtime. Next spring would be the time to scout for any unwanted guests and physically remove the beginnings of a nest early. This not only helps keep them out of your space but gives the queen time to reestablish a nest somewhere else that is safer for both parties and allows them to coexist with us more favorably. 

We always encourage having a bee or wasp identified before managing a nest, for a multitude of reasons. Your local beekeeper may be skilled and willing to help you remove a hive or swarm of honeybees from your property, but they won’t want to go near wasps any more than you might. Some species, like carpenter bees, may cause property damage and management may include removal of the bees as well as some minor carpentry repairs.  Others, like the Cicada Killer, may appear big and scary, but want nothing to do with humans and can be left alone to complete their season.  

If you or a family member has an allergy, damage is being done to property, or the nest is in a high traffic area, removal of the nest may be appropriate. Chemical management products, like bee and wasp sprays, are highly effective when used according to the label. These products will kill the insects. Not all products may fit all situations, so check labels carefully. As an example, sprays for ground bees and wasps should be labeled for ground use. Remember to read the label in its entirety before use and follow all instructions as written. Consider hiring a pest removal professional who can take the proper safety precautions. These professionals also know strategies that may help reduce the impact on nearby pollinators, treating only the problem at hand. 

If you have questions about bees or wasps or need help identifying them to navigate which action to take, the UConn Home & Garden Education Center is here to help!  

The UConn Home & Garden Education Center supports UConn Extension’s mission by providing answers you can trust with research-based information and resources. For gardening questions, contact us toll-free at (877) 486-6271, visit our website at homegarden.cahnr.uconn.edu, or reach out to your local UConn Extension center at cahnr.uconn.edu/extension/locations. 

This article was published in the Hartford Courant September 6, 2025

Spring Landscape and Garden Issues in 2025

By Pamm Cooper, UConn Home & Garden Education Center This spring has been a dramatic one as ornamental trees and shrubs are putting on quite a colorful floral display. Many deciduous ornamentals including redbuds, forsythia, crabapples, fruit trees, quince azaleas and many others were not adversely affected by last summer’s drought and the cold, windy winter and frozen soils that followed. A lesser noticed but significant drama is the negative effect these same environmental conditions had on ornamental and native evergreens. 

Rhododendrons and ‘Green Giant’ arborvitae seemed to suffer the most damage followed by cherry laurels and hollies. Last year’s drought conditions that extended into late fall combined with very windy winter conditions and frozen soils were tough for some evergreens. Winter desiccation injury on broadleaved and needled evergreens causes foliage browning when plants cannot take up the water needed to keep foliage healthy. Damage to many rhododendrons and some azaleas could be seen during the winter and is still evident this spring. Buds may provide new leaves by June if branches are still alive.  

In contrast, 'Green Giant’ arborvitaes suddenly showed symptoms after warm weather began this spring. This was evident especially in trees on windy sites. Needles are brown or off color and time will tell if they are able to recover. If branch tips are flexible and show new buds, growth may resume. Prune any dead branches that show no signs of recovery. 

Large tent like structures with little caterpillars inside them in the crotch of a tree branch.
Eastern Tent Caterpillars in a Black Cherry Tree. Photo by Pamm Cooper

Eastern tent caterpillars have hatched from overwintering egg masses on native black cherries. Silken nests are evident located in crotches of these trees. Caterpillars feed outside the tents at night and hide in them during the day. There is only one generation, and feeding is generally finished by late June. Trees have time to leaf out again to remain healthy during the growing season. Birds like cuckoos and vireos will rip tents apart to feed on the caterpillars. 

If you have Oriental lilies, be alert for the lily leaf beetle. This bright red insect can severely defoliate these lilies. Adults overwinter in soil close to the plants they were feeding on the previous season. They appear as soon as lilies begin new growth above the ground. Leaf undersides should be checked for eggs and larvae and crushed when found. Leaves can be treated if needed with a product that larvae will ingest as they feed on the treated leaves. Never spray flowers with any insect control product and always follow directions as written on the product label. 

Snowball aphid feeding damage is noticeable on the new leaves of European cranberry bush and snowball viburnums. As the aphids feed on the new leaves and twigs, leaves curl and twigs twist in response to aphid feeding on the sap. Aphids can be found by uncurling the leaves. Treatment is difficult as they are not out in the open where contact control products can reach them. Feeding should end within two months of egg hatch. These aphids overwinter as eggs laid on the branches of host viburnums. 

Viburnum leaf beetles, Pyrrhalta viburni, are another significant pest of ornamental and native viburnums. They’re active soon after viburnums leaf out. Damage will be seen as larval populations grow and they skeletonize leaves. Some viburnums may suffer complete defoliation. This pest prefers arrowwood, European cranberry bush or American cranberry bush viburnums. Try switching to resistant varieties such as V. plicatum and Korean spicebush viburnum V. calesii if leaf beetles are a chronic pest. 

If anyone has small St John’s wort shrubs or certain weigela cultivars that seem to be dead, wait and see if new growth resumes as it gets warmer and sunnier. The smaller St. Johns’ wort shrubs die back in fall, leaving brown stems with withered fruit. Prune these back almost to the ground as basal growth appears. Some weigela cultivars are just slowly getting started, while others are already full of leaves. Do not give up these plants but wait and see what happens in May. 

As always, our UConn Home and Garden Education Center office staff welcomes any questions gardeners may have concerning landscape and garden plants problems. Across the New England region, people are having much the same problems as we are having in Connecticut from the winter weather, but we can hope that plant recovery be swift and complete. Enjoy the growing season and stay alert- scout for pests and other problems before they get out of hand.  

The UConn Home & Garden Education Center supports UConn Extension’s mission by providing answers you can trust with research-based information and resources. For gardening questions, contact us toll-free at (877) 486-6271, visit our website at homegarden.cahnr.uconn.edu, or reach out to your local UConn Extension center at cahnr.uconn.edu/extension/locations. 

 

 

This article was published in the Hartford Courant May 10, 2025

A Gardener’s Guide to Planting by Hardiness Zones

By Marie Woodward, UConn Home & Garden Education Center

Map of Connecticut USDA Hardiness zones as of 2023. Most zones in the state are either zone 6 or zone 7.
USDA Hardiness Zone Map for Connecticut, 2023

If you are wondering whether that shrub, flower, or tree that you saw in a magazine or catalog will grow well in your garden, using a hardiness zone map is your best bet to ensure success.   

A hardiness zone map is a tool that divides a geographical area into distinct zones based on average annual minimum winter temperatures. These maps are used by gardeners and farmers around the world to determine which plants are most likely to thrive in a particular region. Each country has its own hardiness map that correlates to their climate. In the United States, the USDA publishes a hardiness zone map, which covers all fifty states and includes Puerto Rico, Guam, American Samoa, and the U.S. Virgin Islands. It uses climate data collected over many years from weather stations throughout a specific region. Then the data is analyzed to determine average minimum winter temperatures from different areas.  

The concept of hardiness zones was first introduced in 1927 by Dr. Alfred Rehder. Rehder worked at Harvard's Arnold Arboretum as a botanical taxonomist. He wanted to address the challenges gardeners and growers faced in selecting plants suited to their local climate. Prior to Rehder’s map, there was no standardized system for categorizing plants based on their ability to survive winter temperatures. His hand-drawn map featured eight hardiness zones and was based on the lowest winter temperatures recorded in various regions across the country. Rehder aimed to provide a practical tool for gardeners and growers. His map made it easier for them to choose plants with the best chances of survival in their region, ultimately contributing to more successful gardens and agricultural endeavors. Rehder’s innovative approach recognized the importance of adapting agricultural practices to local climates. In the 1960s, the USDA adopted and adapted Rehder's concept, creating the first official USDA Plant Hardiness Zone Map.  

Since its initial release, the USDA Plant Hardiness Zone Map has been updated several times to reflect changes in climate and the availability of more accurate data. The latest update of the USDA hardiness map was released in November 2023, jointly developed by the USDA's Agricultural Research Service (ARS) and Oregon State University's PRISM Climate Group. This update incorporates data from 1991 to 2020, covering a broader range of weather stations than previous versions. One of the key findings from this update is that the contiguous United States has become approximately 2.5 degrees Fahrenheit warmer on average compared to the previous map. As a result, around half of the country has shifted into the next warmer half zone, while the other half has remained unchanged. The updated map still consists of 13 zones, but now offers more detailed information on temperature ranges within each zone, including 10-degree zones and 5-degree half zones. Connecticut has two hardiness zones each of which is divided into half zones; (6a,6b); (7a,7b), to better reflect the temperatures in the state over the past few decades.   

The importance of hardiness zones lies in their ability to help gardeners and farmers choose plants that will thrive in their specific region. By selecting plants appropriate for their zone, growers can reduce the risk of frost damage and increase their chances of a successful growing season. However, due to unexpected temperatures outside the average range, there is no guarantee that a plant won’t suffer but it does reduce the risk of plant damage. In addition to gardeners, researchers use hardiness zones to study the spread of insects and exotic weeds, while the USDA Risk Management Agency uses the map to help determine crop insurance rates for commercial growers.  

While the USDA Plant Hardiness Zone Map is an invaluable tool, it is important to note that it is not the only factor gardeners and farmers should consider when selecting plants. Other factors, such as soil type, precipitation, and local microclimates, can also impact plant growth and survival. Gardeners should use the map as a starting point and supplement it with local knowledge and research to make the best plant selections for their specific needs. 

The development of the USDA Plant Hardiness Zone Map is a testament to the importance of adapting agricultural practices to local climates. Since its inception nearly a century ago, the map has evolved to reflect changes in climate and incorporate more accurate data. Today, the map remains an essential resource for gardeners and researchers alike, helping them to better understand and navigate the complexities of plant growth in the diverse regions of the United States. Knowing a plant’s hardiness zone when selecting that shrub, tree or flower will help you grow the garden of your dreams. 

 The UConn Home & Garden Education Center supports UConn Extension’s mission by providing answers you can trust with research-based information and resources. For gardening questions, contact us toll-free at (877) 486-6271, visit our website at homegarden.cahnr.uconn.edu, or reach out to your local UConn Extension center at cahnr.uconn.edu/extension/locations. 

USDA Hardiness Zone Map 2023

A map of the united states color coded to display the USDA Hardiness zones across the country as of 2023. Lower numbered zones are colder and each increment is based on 5 degrees Farenheit.

National USDA Hardiness Zone Map, 2023

USDA Hardiness Zone Map 2012

A map of the united states color coded to display the USDA Hardiness zones across the country as of 2012. Lower numbered zones are colder and each increment is based on 5 degrees Farenheit.

National USDA Hardiness Zone Map, 2012

USDA Hardiness Zone Map 1990

A map of the united states color coded to display the USDA Hardiness zones across the country as of 1990. Lower numbered zones are colder and each increment is based on 5 degrees Farenheit.

National USDA Hardiness Zone Map, 1990

This article was published in the Hartford Courant May 3 2025