Indoor Gardening

It’s Not the Heat, It’s the Humidity

By Dr. Matthew Lisy, UConn Adjunct Faculty 

Close-up of jewel orchids with dark, velvety leaves and contrasting pink and white veining.
Two Jewel Orchids, Macodes petola, bottom left, and Ludisia discolor, right. It is hard to capture the glowing effect of the leaf lines on camera (photo by M. Lisy).

How many times have we all heard that phrase?  Humans generally do not like super humid weather, but many plants love it.  Humidity may even change how a plant grows.  Humidity loving plants actually NEED high humidity to grow, and they generally are not able to adapt to lower humidity.  Symptoms of low humidity in plants can be leaf drop, drying leaf edges, and in some cases, death.  However, with a little special attention and care, a plant enthusiast can add some very unique plants to their collection.   

The summer is the easiest time to grow high humidity plants, unless an air conditioner is used.  Moving the plants outside to a porch is a great way to satisfy humidity needs.  The winter time is the most challenging as the air is cold and dry due to the weather and our heating systems.  There are some easy ways to increase humidity in a home, however.  The first is to add a humidifier, but I have found these end up causing mold issues sooner or later.  A pebble tray or some other kind of tray of water set under the plants, but not touching the pot/soil, can do a fairly good job of increasing humidity.  It will need to have water added once or twice a day.  My favorite way of increasing humidity is by grouping a bunch of plants all together in one area.  They all seem to help each other out by increasing humidity in that spot as they transpire.  A fish tank or bowl of water can also increase the humidity in the room substantially.  A spray bottle can be used to temporarily increase humidity, but the effects are too short-lived to be worthwhile.  Placing a glass or plastic dome over a plant or a small terrarium/plant cabinet is a great way to increase the humidity permanently.  Another idea is to place these plants in a humid bathroom environment where showers are taken.  There are a number of really unique plants that will make for a fascinating collection if the extra humidity puzzle can be solved.    

The first two plants that I absolutely love are collectively called Jewel Orchids.  I have not found them to be too difficult to grow, but they do not tolerate drying out yet cannot sit in water.  I place them on my nightstand next to and underneath some other more “normal” plants.  The Jewel Orchid, Ludisia discolor, is an unusual plant has really dark maroon or brown leaves with reflective pink lines.  The Lightning Jewel Orchid, Macodes petola, has dark green leaves with reflective yellow lines, living up to its namesake. 

Many vining plants like high humidity too.  Any of the common ones like Pothos (Epipremnum sp.), PhilodendronScindapsus, and Monstera tolerate our normal home humidity well, but will grow much larger leaves when exposed to beneficial high humidity.  A more difficult plant is Cissus discolor, and words cannot fully describe its beauty.  The leaves have a pattern of green, marron, pink, and white in them that is unbelievably gorgeous.  This one is so difficult to overwinter that many times I end up taking cuttings of the vines and putting them under a dome.  I mist inside the dome frequently and in the spring, I start over by potting the cuttings up in a hanging basket.  For a blooming vine, try the bleeding heart vine, Clerodendrum thomsoniae, with its white and red flowers. 

 The genus Labisia has some mind-blowing, incredible colors and patterns.  These plants are expensive, but worth a try.  AnthuriumAlocasia, and Syngonium generally have arrow or heart shaped leaves.  They have some very unique patterns and shapes, but they do struggle and die if the humidity drops.  The prices are all over and just depend on the variety.  Other foliage plants include Begonia rex with all sorts of colors and patterns or Fittonia with red, pink, or white stripes on green leaves.  Why not try taking the houseplant hobby to the next level by adding some humidity loving plants?     

The UConn Home Garden Education Office  at the George Leigh Minor Plant and Soil Health 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 office at extension.uconn.edu/locations.    

 

This article was published in the Hartford Courant August 1, 2026

If Scindapsus is Wrong, I Don’t Want to Be Right 

By Dr. Matthew Lisy, UConn Adjunct Faculty

Hanging silver satin pothos plant with trailing, heart-shaped green leaves marbled with light gray, suspended from a plastic hook against a plain background.
Scindapsus pictus ‘Silver Satin,’ Photo by M. Lisy.

It really is not sinful to like Scindapsus.  In fact, it can be very enjoyable to add some to your plant collection.  These are a lesser-known houseplant, but are rapidly becoming very popular.  They are very similar to the vining Philodendrons, and are most often confused with Pothos (Epipremnum).  All of these aforementioned plants belong to the Araceae family.  The Scindapsus come from Southeast Asia, Philodendrons from Central/South America, and Pothos from the Tropical Pacific. Although they come from different parts of the world, they all live in rainforest habitats, and therefore will do well when grown together.  The thing that most stands out about the Scindapsus species are the unique colors.  They are generally a gray or green color.  Now that base color has, to more or less degree, some silver colors overlaid, except for some that don’t have any additional color at all.   

 The nicest part of Scindapsus is that they have very similar care to their look-a-like cousins.  They generally like to have the top inch or two of soil dry out between waterings.  The soil should be that used for aroids.  If using a commercial houseplant soil, add some extra perlite and/or orchid bark to lighten it up a bit.  The growth habit could be up a moss pole, or in a hanging basket.  I prefer the hanging basket on these as I really like the look of the long vines hanging over the edge of the pot.   

 They are fairly easy to propagate.  Take a cutting between the nodes – the place where the leaves grow out from.  Trim this and put it in soil.  Keep this in a moist and humid environment.  Before long, there will be new growth tips emerging from the node.  At that point, start adding some fertilizer to really kick things into gear.  These plants adapt well to growing in our typical home environment, but they do not like it super dry.  They tend to grow larger leaves in more humid environments, so think about putting one in the bathroom near the shower.    

 There are some fabulous new varieties of these plants, but because they are not as common yet therefore somewhat tricky to find.  It seems there are new varieties coming to market more frequently now.  Many of them are variations on the amount of silver in the leaves, or the pattern the silver coloration makes.  There are two main species regularly offered so far in the trade.  Scindapsus pictus, which has more of a round leaf, and Scindapsus treubii, which has more of an elongated, narrow leaf.  There are more species, and I am sure we will see the “house friendly” ones coming to market in the future.   

Close-up of a large, heart-shaped satin pothos leaf with a deep green center and silvery mottled patterns across the textured surface.

Scindapsus pictus 'Mount Salak,' Photo by M. Lisy

Close-up of a single silvery-green leaf with a soft, matte texture and visible dark veining running from the center to the edges.

Scindapsus pictus 'Platinum' Photo by M. Lisy

Close-up of a heart-shaped satin leaf with green coloring and irregular pale silver mottling across the surface.

Scindapsus pictus 'Silvery Ann,' Photo by M. Lisy

Close-up of a heart-shaped satin leaf with a silvery-green surface and dark green mottled patterns, showing a soft, velvety texture and central vein.

Scindapsus pictus 'Silver Satin,' Photo by M. Lisy

Close-up of a smooth, heart-shaped Scindapsus treubii ‘Moonlight’ leaf with a silvery-gray sheen and a darker green midrib running down the center.

Scindapsus treubii ‘Moonlight’ Photo by M. Lisy.

S. treubii  has a beautiful form called ‘Moonlight.’  It is a nice silver leaf with a green stripe down the middle.  This contrast produces a truly is a gorgeous plant when it gets larger.  There is a new variety called ‘Dark Form,’ which has almost black leaves.  I can’t wait to get this one!  All of the other varieties I will talk about are of the S. pictus species.  The first is ‘Silvery Ann.’  It is a green leaf with silver specs, squares, or blotches, but not too many.  It really makes a nice looking, unique plant.  ‘Silver Satin’ has an intense, broad silver coloration on top of a green leaf.  The variety “Mount Salak’ has much less intense silver, with some leaves having almost a light green color instead.  Its mottled color looks great over the green leaf as well.  My all-time new favorite is ‘Platinum.’  I found this one unlabeled in a big box store recently.  What a beautiful color!  Although on its own it is tempting to think the plant boring, but place it into a collection of green house plants and this one really shines!  Why not add some Scindapsus to your plant collection?       

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 June 21, 2026

Hold Off for Healthier Soil: Managing Spring Compaction Risks 

By Nora Doonan, Soil Science Graduate Student, UConn Department of Plant Science & Landscape Architecture 

Bare soil and patchy grass showing deep tire tracks and compacted earth across a lawn area.
Repeated traffic over lawn causing immediate, visible wear and long-term soil compaction. (Nora Doonan)

In the case of soil compaction, the early bird often does not get the worm. As temperatures rise, many Connecticut residents are eager to get back into their gardens and begin lawn care. However, after a winter marked by significant snowfall, the effects of snowmelt are still present in the form of pooling water and high soil moisture. Although the warmer weather may seem like the perfect time to begin spring yard work, it is often best to wait. Working or walking on wet soil can lead to compaction, a soil condition that can negatively impact plant health throughout the growing season. Wet soils are more easily compacted than dry soils, and once compacted, they are much harder to remediate.  

Soil compaction restricts root growth, making it difficult for plants to access water, nutrients, and oxygen. As a result, plants may show reduced growth and lower yields. Compacted soils also limit water infiltration, which can lead to increased runoff during spring precipitation events. This not only reduces water availability for plants but can also contribute to soil erosion and water pollution, particularly in areas located near streams, ponds, and other water bodies.  

Soil microorganisms are impacted by compaction, some of which are responsible for soil nutrient cycling. For example, compaction reduces pore space, which holds oxygen and a lack of oxygen in the soil can increase the rate in which some bacteria perform denitrification, a gaseous loss of nitrogen to the atmosphere. Other soil organisms are impacted as well. Non-burrowing animals, such as mites and springtails, have difficulty penetrating compacted soil, and there is often a decline in burrowing species like earthworms, ants, and beetles.  

Common causes of soil compaction include heavy foot traffic and the use of equipment such as lawn mowers, spreaders, and vehicles. Following the same consistent pathway through your yard and garden, even if it seems insignificant, can lead to substantial compaction overtime, especially in high soil moisture conditions. Homeowners should also be cautious about allowing heavy vehicles, such as mulch delivery trucks or off-street parking, onto lawns when soils are wet. Additionally, tilling wet soil can do more harm than good by creating dense soil layers and deep ruts. It is important to wait until soils have dried sufficiently before working them. 

To assess whether soil is compacted, start with a visual inspection. Areas with poor plant growth, shallow roots, or standing water after rainfall may indicate compaction. Simple field tests can provide further insight. One method is to dig into the soil with a shovel or spade a few days after a rainstorm. Signs of compaction include surface crusting, plate-like soil structure (resembling stacked dinner plates), or large, dense clods. Another method is to perform a soil hardness test. A few days after rain, try pushing a wire flag or similar probing object into the soil. Hold the flag at the top and press the wire into the soil without bending it. This test is most accurate when soils are moist but not saturated, and care should be taken to avoid rocks. If the probe penetrates less than 4 inches, the soil is considered compacted.  

Preventing soil compaction is far easier than correcting it. Avoid walking on garden beds and refrain from working soils when they are wet. Use lighter equipment whenever possible and maintain ground cover to protect the soil surface. If necessary, aerate compacted soils and incorporate compost or organic matter to encourage biological activity from soil organisms that naturally improve soil structure. While organic residues such as compost can help cushion the effects of compaction, excessive traffic will degrade these materials over time. Soils with low organic matter are especially vulnerable to compaction, making regular amendment essential. 

Patience in early spring can pay off throughout the growing season. Waiting until soils are drier before beginning yard work will help protect soil structure, promote healthy plant growth, and support long-term landscape sustainability. 

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 April 4, 2026

I “Heart” Philodendrons

By Dr. Matthew Lisy, UConn Adjunct Faculty

 

Hanging philodendron plant with trailing green heart-shaped leaves in a black pot suspended by cords against a light-colored wall.
Philodendron hederaceum, the legendary Heartleaf Philodendron in its classic green form (photo by M. Lisy). 

Back in the late1970s when I stumbled upon my mother’s abandoned houseplant book, I had no idea what impact that would have on my life.  It was a treasure-trove of knowledge for me, and came with a gallery of some of the most common houseplants.  One in particular caught my eye – the Heartleaf Philodendron.  I was immediately in love (see what I did there?).  All jokes aside, this was one of the biggest staples of the houseplant world, and it still is.  Characterized by green heart-shaped leaves, they were commonly displayed in macramé plant hangers.   

 These plants, like many of our houseplants, come from humid tropical Central and South American forests.  The word Philodendron comes from the Greek and means “tree lover.”  This name serves as both the scientific and the common name.  As one would expect, plants in this genus grow on trees in some fashion.  Of course there are exceptions, but most will readily grow up moss poles if provided.  A number of the species are perfectly suited to life in a hanging basket, and are commonly referred to as “trailing” to describe their growth habit.  A few of my favorite trailing-types are the ones I will focus on for this article.  Trailing Philodendrons are one of the easiest plants to grow and also the easiest plants to kill.  The secret to their success is to not over water them.  The top inch or two of the soil should dry out before they are watered again.  They are very unforgiving to overwatering, and quickly develop a fungal infection that will fist cause many leaves to drop, and then the vines will wither and die.  Many people see this and assume the plant needs more water, and then accidentally ensure the plant’s death.  If they are put outside for the summer, I recommend hanging them under a covered porch so the watering is controlled.  

The old-school Heartleaf Philodendron was just the beginning.  It is known as Philodendron hederaceum by scientists.  It may be incorrectly labeled as Philodendron cordatum, but this is an older/inaccurate name and beyond the scope of this article.  One modern favorite variety is called Lemon Lime.  As expected, it has some light green to yellow leaves in bright light.  Next to the regular green, this variety really stands out.  Lemon Lime is similar to one I had thirty years ago called Lemon which had only yellow leaves.  There is another new one called Neon that has all yellow leaves as well.  It is hard to know if these are true varieties or repackaged versions of the old Lemon with newer names.  Brazil is another very hardy variety that has green leaves with a large, thick yellow stripe down the center of each leaf.  There is variability in the amount of yellow in each leaf, which adds further interest to the plant.  A similar but more striking variety is called Silver Stripe.  This plant has a thinner stripe down the middle that is mostly cream or silver colored.  This was extremely expensive last year, but is much more common and therefore cheaper now.   

 There are a number of different species with similar appearance and growth habits to our P. hederaceum.  One of the real stand-outs is the Philodendron brandtianum, commonly referred to as the Silver Leaf Philodendron or Philodendron Brandi.  The leaves are a gorgeous true silver color with green stripes following the veins.  These are slower growing than the others mentioned here.  By the end of last year, it was somewhat affordable in four-inch pots.  I have yet to see it offered in a larger hanging basket (probably a few years away from that).  A close look-a-like to this plant is the Philodendron sodiroi, which is also called the Silver Leaf Philodendron.  Though less intensely silver and with paler green coloration, the leaves are larger.  I finally saw one for sale last summer but passed on it as I think it was a mislabeled P. brandtianum.  Nevertheless, I am sure these will be equally popular with collectors. 

Close-up of a single bright green, heart-shaped leaf with smooth edges and subtle veins against a white background.Close-up of a heart-shaped leaf with dark green coloration and irregular lighter green variegation, slightly curled and textured, against a pale background. Close-up of a single heart-shaped green leaf with a lighter yellow-green stripe running down the center against a white background.
Close-up of a single heart-shaped leaf with dark green coloring and silvery mottled patterns against a white background.

From left to right: Philodendron hederaceum ‘Lemon Lime,’ ‘Brazil,’ ‘Silver Stripe,’ and Philodendron brandtianum (photos by M. Lisy). 

All of these plants are easy to propagate by cutting the stem and leaving one leaf per node.  Dip it in rooting hormone and keep it in a moist, clear-bag-covered pot and in a few months, there will be new growth.  Alternatively, they can be rooting in water, but I prefer the soil method as it doesn’t have to adapt from water to soil when transplanted. 

 I am hopeful that this article will rekindle an old flame with the Heartleaf Philodendron or its relatives.  They are all generally available now in many of the big box, online, and brick-and-mortar plant stores.  Why not pick one up to beautify the home for many years to come? 

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 March 28, 2026

Potted Bulbs for Color and Scent 

By Dawn Pettinelli, UConn Home Garden Education Office 

Potted hyacinths and freesia plants sit on a windowsill, with purple blooms and green leaves contrasted against a snowy outdoor scene visible through the window.
Photo by Dawn Pettinelli

With snow covered gardens and more wintry weather on the way, many of us can’t resist the temptation to purchase potted hyacinths, daffodils, tulips, primroses and other delightful spring blooming plants to bring some early color and fragrance to our homes. It was especially difficult to leave the Connecticut Flower and Garden Show last week without an armload of plants forced into bloom.  

 To enjoy your plants to the fullest, here are some tips on caring for them. First realize that these plants were ‘forced’ into bloom at an earlier time than they would on their own. Growers manipulate the growing conditions of the plants by regulating temperature, light and moisture. This does stress plants somewhat so depending on the type of bulb, some may or may not bloom again.  

If you have not purchased any pots of forced bulbs yet but are planning to, select ones that are still budded or ones where just a few flowers have opened. This will ensure a longer bloom period for you to enjoy. If temperatures are below 40 F, it is best to bag or wrap the plant in the store to keep the blossoms and foliage from cold injury and get the plants home as soon as possible. Leaving them in an unheated car in frigid temperatures is not a good idea.  

Whether you’ve chosen to bring home spring flowering bulbs, like hyacinths, or a hardy perennial, like primroses, they pretty much all have similar requirements as houseplants. All these plants appreciate being kept in cool temperatures with between 50 and 60 F being optimum and 70 F probably being the upper limit. Warmer temperatures will cause plant growth and flowering to speed up so your blooms won’t last as long.  

Bright indirect light for 6 to 8 hours of the day will keep your plants growing longer. Lately with the cloudy weather and limited sunshine, most of us can keep plants in a south window this time of year as the sun’s light is less intense and also, sparser than we would hope. Usually, the temperatures near windows are much cooler than other areas of the house.  

All of these plants, as well as most other houseplants, grow best when kept moderately moist. Avoid overwatering or having pots sit in water as that can lead to root rots. I’ve noticed growers shying away from peat based potting mixes that were more moisture retentive. So, check plants every other day at first to see when they are in need of watering. While the plastic or foil pot wraps might make your selection look more appealing, they often do not have drainage holes so if pots are overwatered, the excess water stays in the wrap and the roots remain saturated and prone to rot. I like to water these plants by taking them out of the wrap, bringing them to the sink and applying enough water so that it runs out the bottom for a half minute or so and then let them sit in the sink until excess water drains out. Then return to their wrap or better yet, a saucer where excess water can be easily seen and dumped.  

As far as fertilizing goes, it depends on whether you want to keep these plants and set them out in your garden when warmer weather arrives or will they get relegated to the compost or trash heap. If you intend to plant them out, then fertilize them using a half strength houseplant fertilizer every other week. The reason being you want the green foliage to photosynthesize as much as possible before the plants go dormant. The food produced by this process will enable the bulbs to sprout and grow next year. Even if not planted out, perennials like primroses will bloom for a longer period of time inside if regularly fertilized.  

I have found flowering bulbs, like hyacinths and daffodils, to come back pretty successfully when planted in the garden, while having little success with tulips, unless they are species tulips or some of the smaller Greigii varieties. If keeping bulbs for planting out, remove the flower stem after blooms have faded but keep watering foliage until it starts to fade and brown. Remove the dying leaves and then the pot can be moved to a cool, dimly lit spot and just kept barely moist until the soil can be worked in the spring.  

For primroses, remove the flower stalks as blossoms fade. Depending on the species purchased, your plants may or may not be hardy outside. Hopefully the plant tag will mention hardiness zones or at least give you the species so you can look it up. Primroses can be kept as houseplants but they do require cool temperatures, bright indirect lighting and regular fertilizing and watering when forming buds and in bloom. In the garden, primroses sulk in hot weather often dying back until next spring when cooler temperatures prevail.  

With a little care, flowering bulbs and other plants can liven up these dreary winter days. At least they let us know, spring is right around the corner. 

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 February 28, 2026

Keeping Valentines Day Flowers Fresh

By Heather Zidack, UConn Home Garden Education Office

Valentine’s Day is one of the biggest holidays, next to Mother’s Day, in the floral industry. Whether you’re buying fresh cut flowers, or a potted plant for someone special, helping them keep those flowers looking their best can be part of the gift you give this year.  

Pink, yellow, and purple Alstroemeria flowers arranged together in a small bouquet with green leaves.
Photo by H. Zidack

Start by selecting flowers that look healthy and vibrant. You want flowers with firm petals, with buds just starting to open or have just recently opened. Avoid flowers that are releasing pollen, are discolored, or have drooping foliage. Check the stems for rigidity and make sure that plant material is clean with no indications of mold or decay. When you purchase your flowers, many florists will give you packaging to help reduce their exposure to the extreme cold as you carry them to your car. This is an important step, so don’t skip it if you can! Avoiding large temperature fluctuations will keep your flowers fresh for longer.  

When you get home with your flowers find a vase that is clean and free of debris. Always wash vases with warm, soapy water in between uses to prevent the transmission of bacteria and disease from one bouquet to the next. Add fresh, tepid water. Remove all plastic, rubber bands, and other packaging from your bouquet. Cut each flower stem at a 45-degree angle using hand pruners or snips. Using scissors, or knives that aren’t sharp may crush the vascular tissue and prevent the flowers from taking up water, leading to faster decline. Remove any leaves that would sit below the water line before placing stems into the vase.  

If you have a bouquet of roses, take special care when you are preparing their stems. These flowers will live longer if you cut their stems under water, using the same 45-degree angle, and place them in your vase of water as quickly as possible. This extra step ensures that air bubbles don’t work their way into the vascular tissue and will keep your roses fresh for longer. When we see roses develop a “floppy neck,” this is most often the cause. While it is possible to revive your roses from this issue, it is best to try to avoid it altogether.  

There are many anecdotes out there regarding additives to provide food and antimicrobial agents to the water to help your flowers last longer. Many of these anecdotes aren’t based in research. If your bouquet comes with a flower food packet, mix it as instructed and use it in your vase. However, if you don’t have one, don’t worry about adding anything. Instead, focus on ensuring that you are giving your flowers fresh, clean water. 

Decay and microbial growth are two of the biggest reasons our cut flowers pass quickly. Many of the strategies mentioned above help to mitigate this concern, but it is important to keep a watchful eye. Besides washing your vase in between use, sanitize your flower snips or pruners in between uses as well and watch the water quality in your vase, replacing it every couple of days with fresh, cool, water. Always change the water if it appears murky or cloudy in the vase.  

When changing your water, make a fresh cut 1-2 inches up the stem to ensure that the vascular system is staying open and clean of any debris or bacteria. If stems are starting to get mushy, cut high enough above the decay, or consider removing the stem entirely from the arrangement. Keep your flowers in a location that is bright but avoid direct sunlight, and keep them away from drafts, or entryways where large temperature fluctuations are likely. Lastly, know when to say goodbye and dispose of any flowers that are past bloom, or showing signs of decay. You may notice that you’ll need a smaller vase as you cut your stems shorter or remove flowers as they pass. A mason jar makes for a great display for those longest lasting flowers!  

There’s no doubt that fresh flowers bring vibrancy and life into our homes during these blustery, winter months. Whether you’re buying a bouquet for yourself, or for someone special this Valentine’s day, keep a close eye on them and you’ll be sure to have long lasting blooms to enjoy!  

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 athomegarden.cahnr.uconn.edu, or reach out to your local UConn Extension Center atextension.uconn.edu/locations.  

This article was published in the Hartford Courant February 15, 2026

Camellias for Color, Inside and Out

By Dawn Pettinelli, UConn Home Garden Education Office

The image shows a plant with dark green leaves and vibrant red flowers with yellow stamens. The background has colorful lights.
Photo by Dawn Pettinelli, UConn Home Garden Education Office

Now that the holidays are over, the decorations are put away and scenes of dreary, wintry weather dance in our heads, one plant with flowers resembling roses that comes into bloom this time of year are camellias. These Asian natives have been cultivated for possibly 5000 years. Most of us are familiar with Camellia sinensis var. sinensis aka, tea! Black tea, white tea, green tea all come from the same plant just processed differently.  

 Other camellia species were noted and grown for their flowers gracing gardens of temples and nobility. Prized plants were selected and crossed and eventually made their way to England, sometime in the 1730s. These elegant and highly treasured plants soon were spread all over Europe with hybridists and propagators in Italy, France, Belgium, Holland, Portugal, Spain, Germany and the U.K. by the middle of the 19th century. More and more hybrids and cultivars were being developed with the number now well over 3,000. As their popularity grew, camellias were soon being grown in Australia, New Zealand and the U.S. Societies, like the American Camellia Society sprang up and shows were held (and still are) to exhibit various forms and compete for awards.

Options for growing camellias in Connecticut depend on what part of the state you live in. Thanks to breeding efforts of Dr. William Ackerman (retired USDA plant breeder) and Dr Clifford Parks (Univ of NC botanist) varieties of camellias hardy to zone 6 (-10 F) were developed. Depending on the variety and environmental conditions, camellias can bloom from fall to spring. Many of the most popular cold hardy, fall blooming cultivars belong to the Winter Series bred by Ackerman and include plants such as ‘Polar Ice’, Winter Charm’ and ‘Winter Rose’, the latter reaching only 2 to 3 feet high and wide making it a possibility for container culture.  

 Dr. Parks focused on cold hardy spring bloomers including the April series (C. japonica hybrids). Many grow from 5 to 10 feet tall and can be found at some local nurseries. Look for ‘April Rose’, ‘April Blush’, ‘April Remembered’ and ‘April Tryst’.   

Keep in mind that our weather has been somewhat unpredictable so those in zone 6 might want to locate plants in a semi-shaded, protected location. Camellia flowers are just exquisite, resembling roses in colors ranging from white to pink to red. Some are picoteed, some are double and some are very fragrant. The dark green foliage holds up year-round.  

The image shows a close-up of a delicate flower with soft pink petals, yellow stamens, and glossy green leaves. The background is slightly blurred.
Photo by Dawn Pettinelli, UConn Home Garden Education Office

Camellias, being broad-leaved evergreen shrubs, have similar requirements to rhododendrons. They do best in an acidic, well-drained soil amended with organic matter. It is often best to group them for effect and also for some protection from the elements. Plants are slow-growing and need adequate moisture but avoid planting them in poorly drained sites. Semi to full shade is preferable as the leaves may scorch in sunny, dry areas. A fertilizer for acid-loving plants can be applied in early spring as directed on the package. Pruning is rarely needed but could be done right after flowering.  

I’ve never been fortunate to live in a warm enough location to plant camellias outdoors, but several cultivars are perfect as house plants if kept in a cool spot indoors. Two available from Logee’s in Danielson are ‘High Fragrance’ with delightfully scented light pink semi-double flowers and ‘Scentuous’ with fragrant, semi-double white blossoms. They have others blooming in their greenhouse.  

Growing camellias in containers is a splendid way to get winter color, often along with fragrance. According to Logee’s co-owner and horticulturist, Bryron Martin, plants require an acid soil with a pH around 4.8 to 5.8. They can be grown in a camellia/azalea potting mix. Martin advises that young plants can be pinched back for fuller growth although that will delay flowering a bit. Keep in mind that some cultivars can get up to 6 feet in height so either select those that mature at a smaller size or be sure you have space to accommodate them.   

Temperature is key to induce blooms. Ideally Martin recommends nighttime temperatures no higher than 59 F during the winter and preferably 30 – 40 F so an unheated room or sun porch is a great place for camellias. If nighttime temperatures are too high, the buds will drop. An east or west exposure will provide adequate light.  

Fertilize camellias in the spring when active growth begins. Use a fertilizer for acid loving plants as directed. Commercial synthetic and organic camellia fertilizers are available. Some growers use a cottonseed meal/bloodmeal homemade blend. To supply adequate magnesium to plants, Martin recommends dissolving 1 tablespoon of Epsom salts in a gallon of water and applying this mixture twice a year.  

For late fall through spring blossoms, indoors or out, camellias are attractive, evocative plants that perhaps more folks might consider cultivating. Those looking for a Valentine’s Day activity might consider the Camellia Festival at Planting Fields in Oyster Bay, NY. The Lyman estate in Waltham, MA also has a camellia greenhouse that is open to the public.   

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 January 18, 2026

You Are the Sunshine of My Life

By Dr. Matthew Lisy, UConn Adjunct Faculty

Small potted plants inside a clear plastic dome under bright pink LED grow lights.
The pink/purple light caused from a combination of red and blue LEDs are great for growing these Cissus discolor cuttings, but it does not help humans to see their true colors (photo by M. Lisy).

This old song seemed like the perfect title for talking about artificial lights for houseplants.  Even if there are windows in a room, the amount of light is very low.  Fortunately, there are relatively cheap LED options available.  Light is made up of the different colors, or wavelengths, of the visible spectrum – Red, Orange, Yellow, Green, Blue, Indigo, Violet.  A plant’s pigments capture light energy and use it to make food.  Chlorophyll production peaks in the red and blue spectrums, but accessory pigments help plants capture additional wavelengths of light.  As such, there are optimal wavelengths of light that will better support plant growth.  This is known as Photosynthetically Active Radiation, or PAR.  We measure PAR by using the Photosynthetic Photon Flux Density, or PPFD.  This measures the amount of photons of light in the correct range hitting a specific area, and is measured in micromoles per square meter per second (µmol/m2/s).  A PAR meter is an expensive way to measure how much usable light is available for your plants.   

LED specialty lamps that have a good spectral output (PAR) are easily acquired.  I would caution the buyer to read the reviews to help judge the quality.  Good lights will generally include some description of PAR and/or PPFD.  Light quickly diminishes with distance, as it essentially becomes less concentrated.  Look in the product information for how close the plant should be to the light for maximum effectiveness.  Generally, keep the plant 12-18 inches away from the light source.  If it is too close, or the light is too bright, plants can be burned, drop leaves, or become spotted.  A cheaper option is to use existing light fixtures and replace the bulbs with either full spectrum or plant grow bulbs.  The ideal plant grow bulbs look pink, as they have red and blue LEDs.  Full spectrum bulbs tend to have a better mix of wavelengths to make the light appear more natural to us, but still have good PAR.  CRI, or Color Rendering Index is a measure of a light’s ability to accurately show colors compared to natural light.  The closer to 100, the better the light’s appearance.   

We can also judge a bulb by “color temperature” reported with a Kelvin number.  For example, a 2700K bulb is commonly referred to as a warm white.  This is reminiscent of the light given off by a traditional incandescent bulb, and shows heavier output in the red end of the spectrum.  A 6000K bulb would be called a “daylight” bulb, and has a heavier output in the blue end of the spectrum.   

Many people confuse quality of light with brightness, which is measured in lumens.  Light can be very bright, but of poor quality.  Too bright, and it may burn the plants.  Also, buying a light that throws out a lot of green light does not do much, even if it has a high output (lumens).   Lastly, Watts are used as a measure of energy consumption.  While it is true that higher wattage may mean a greater output of light energy, the efficiency of LEDs means that a lot less watts are needed to put out the same number of lumens as compared to an incandescent bulb. 

So, then, this begs the question: What light is best for growing plants?  To answer, I am going to assume that the plants are going to be displayed in the living area and viewed by people regularly.  In this case, I would try and find a 5000K bulb with a CRI close 97 or 98, and a PPFD rating that matched the requirement of my plants for the given distance from the light fixture. 


The following is a quick list of what is useful and what is not useful as a metric for plant growth:

PAR - Photosynthetically Active Radiation. It is the ideal measurement for plant growth.

PPFD - Photosynthetic Photon Flux Density. It is a useful metric to judge output at a particular distance from the fixture.

Kelvin - Kelvin refers to “color temperature” – lower number more red (ex. 2700), higher number more blue (ex 6500). It is not detailed enough as a metric for plant growth.

CRI - Color Rendering Index. It is useful for how true-to-life the plants will look.

Lumens - A unit to measure brightness. It is not particularly useful as a metric for plant growth.

Watts - How much energy is used to run the bulb/fixture. It’s not useful as a metric for plant growth, but lower wattage costs less to run equipment.

Warm vs Cool - Warm indicates the red end of the spectrum while cool indicates the blue end of the spectrum.  See Kelvin. It is not detailed enough as a metric for plant growth.


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 1, 2025