We discussed some of the dark-leaved choices that are growing in this garden and are simple to acquire on the market last week when we looked at coral bells. We’ll examine several amazing possibilities for sunny sites this week.
Coral bells were once considered to like the shade. However, Heuchera villosa is a plant that is indigenous to the southeastern United States. It is a species that is flexible and does well in a variety of environments, including full sun to partial shade, somewhat moist to slightly dry soil, and high humidity. It makes sense that it is a well-liked plant for southern gardening.
This species has caught the attention of hybridizers, and it is now a parent species in many popular hybrids. The world of coral bells has been rocked by the French hybridizer Thierry Delabroye, who has flooded the market with a variety of delectable cultivars that are intended to either make you hungry or thirsty. The cultivars offered by Delabroye include “Carmel,” “Brownies,” “Mocha,” “Pistache,” “Tiramisu,” “Pinot Gris,” and “Beaujolais.” Many of these cultivars have been used by us in container displays. In the Trial Bed Garden at the Home Gardening Center, we are cultivating “Brownies” this year.
The fact that Heuchera “Brownies” is thriving in the demanding climate of New York’s High Line park attests to its reputation as an alluring and versatile coral bell. Its leaves starts out brown, changes to a greenish brown, and finally has a deep purple-red underside. Similar to the bulk of Heuchera villosa hybrids, it has fuzzy foliage and big leaves. It develops a big two foot clump that is over a foot tall.
It’s also worthwhile to look for Heuchera villosa hybrids created by American hybridizer Dan Heims. His cultivars have names like “Southern Comfort” and “Georgia Peach” that refer to the species’ local origin.
In the Trial Bed Garden, Heuchera ‘Southern Comfort’ is being grown. It has peachy, golden tones at the beginning of the season, which change to coral at the end. This cultivar has shown itself to be unbreakable; it overwintered beautifully and burst into color in the spring. It is a large specimen as well, standing 15 inches tall and with a spread of more than two feet.
Here’s some crucial gardening guidance for my readers:
Make sure to be mindful of your watering methods while they are establishing if you are growing these coral bells in sunny conditions (this is a common practice with all of your plants). Following that, keep in mind to water them during prolonged dry times. When exposed to extreme heat and drought, they will protest by turning brown on the leaves.
Avoid spoiling beautiful coral bells by sparingly fertilizing them. Since they are already active at the beginning, encouraging excessive development that will eventually collapse in adverse conditions is pointless. Let them “suffer through.
Where should heucheras be planted for greatest results?
Although certain dark-leaved cultivars can be planted in a sunny location to enhance the depth of leaf color, most prefer partial or dappled shade. cultivars with paler leaves often become burnt by excessive sun.
They require soil that drains well and doesn’t remain wet. Rotting can happen in wet environments. Plant heucheras in pots or raised beds if your soil is soggy.
These small plants look great lining the front of a border or mixed in with other low-growing plants in a prominent location.
Many heucheras thrive in dry shade, making them suitable for planting beneath light-canopied trees or bushes.
Planting in huge clusters of a single color or a kaleidoscope of contrasting or complementary colors will add a brash blast of color.
Tiarellas and heucherellas, which are closely related, make excellent companion plants because they prefer comparable growing environments.
When to plant heucheras
The optimum seasons to plant are spring and fall, when the earth is warm and moist and the plants may easily establish themselves.
But as long as the ground isn’t frozen in the winter or dry in the summer, they can be planted at any time of the year.
If you plant in the summer, be very careful to water frequently because they will struggle to grow in hot, dry circumstances.
How to plant
Heucheras are simple to grow, both in the ground and in containers, together with their near relatives tiarellas and heucherellas. Just adhere to the instructions below.
Before planting, work a lot of organic material—such as garden compost—into the entire planting area, not just the planting hole, at a rate of around one bucket per square meter or yard. The soil will be improved, and the roots will be encouraged to spread outward.
Heucheras are prone to rotting if their crown (centre) is buried, so it’s important to put them at the same height they were growing at or a little higher.
A Heuchera needs how much sunlight?
Coral bells are one of the easiest perennials to cultivate and require very no maintenance. Basics are as follows:
- Coral bells can withstand a variety of light conditions, poor soil, heat, cold, humidity, and drought and are hardy in USDA zones 4 through 9.
- From silver to almost black, foliage occurs in almost all colors. Leaves might be smooth, patterned, ruffled, or wavy.
- Flowers come in coral, red, white, or pink hues, and they draw butterflies and hummingbirds. They also survive a long time when cut into arrangements.
Coral bells can be cultivated in a variety of lighting situations, including full sun and partial shade. When plants receive at least 4-6 hours of direct sunlight, their foliage color and bloom are at their peak.
Heuchera prefers rich, well-draining soil but may also grow in clay, rocky, and salty soils. Before planting your new coral bells, amend your garden soil to increase drainage if it is heavy clay, or plant them on a raised bed.
Watering: Maintain a uniformly moist but not waterlogged soil. Once planted, heuchera can tolerate some drought. In times of extreme heat, provide more water.
Fertilizing: Around the base, use a balanced slow-release granular fertilizer in the spring, or sprinkle a thin layer of compost. Add supplemental water-soluble fertilizer as directed for plants growing in containers.
Containers: Coral bells thrive in growing spaces. Simply make sure the bottom has a hole through which the extra water may drain. If you want them to return the next year, plant seeds into the landscape in the early fall. They can overwinter in containers if you garden in a zone 6b or warmer.
Heuchera dieback over the winter?
According to the University of Illinois Extension, coral bells (Heuchera spp.), which are native to North America, are ideal plants for the shady section of the garden in U.S. Department of Agriculture plant hardiness zones 3 through 8, depending on the species. Coral bells, sometimes known as alum roots, can grow as evergreens but may die back in your climate, especially during colder than usual winters. Give your coral bells a little careful loving care during the winter to ensure that their unique foliage and blossoms reappear the following year.
Heucheras can they withstand heat?
Breeders have recently introduced a large number of cultivars with stunning hues like chartreuse, peach, deep purple, silver, caramel, and red, as well as many with contrasting venation colors. These more recent cultivars have flower clusters that are held on spikes above the foliage and come in pink, white, or red hues.
Some hybrid cultivars that are being sold online might not be as tolerant of the heat as those that are generally available at nurseries in the South. Heuchera villosa, which bestows heat tolerance, is frequently found in the ancestry of the cultivars that can withstand more heat. “Caramel” and “Citronelle” are two top-notch cultivars recognized for their ability to withstand heat.
Heucheras want shade, right?
Coral Bells is one of the most adaptable perennials you can grow in zones 4–9. (Heuchera). Here is a plant that, as long as it receives water, will thrive in any level of light, from complete shade to full sun. Coral bells prefer moderate moisture levels and some shade. It will require a bit more water if you put it in full sun, and it will take a little longer to reach its maximum size if you plant it in full shade. Coral bells hate dense, soggy soils, especially in the winter, so if you garden in clay, make sure to amend it before planting.
How do you know which coral bells are ideal for your environment when there are so many different varieties currently available? Consider the leaves before you buy, as this is a hint. The types with thinner, glossy leaves should thrive for you if you reside in a region of the country that is comparatively cool and dry (low humidity levels). Those types with larger, fuzzier leaves might do better for you if you reside somewhere that is generally warm and sticky (high humidity levels). Coral bells with sparkling leaves and fuzzy leaves are now offered in a variety of hues to match your gardening palette.
Recommended Coral Bells:
- “Blackberry Ice” by Dolce With its incredibly iridescent purple leaves with black veining, this heat-tolerant variety will amaze you in the spring. In the landscape, it swiftly expands into a sizable, sturdy clump that acquires a metallic pewter color in the summer heat.
- Dolce’Appletini’
- Try this dazzling chartreuse to yellow assortment if you want to enliven the darkest areas of your landscape. Its big, fluffy leaves create a billowy cloud that perfectly contrasts with green ferns and yellow variegated hostas. Just keep in mind that its light-colored foliage may burn in the sun; therefore, provide it with the necessary protection, and it will work flawlessly for you.
How can I prevent my heucheras from becoming too long?
Your heuchera might start to seem very clumped and leggy after a few years. You may see woody stems that extend back to the plant’s top when you divide the leaves. To prune, trim the stems back to a point just above the tops of new growth buds.
Before planting your cuttings in potting compost—or general purpose compost with additional grit and a delayed release fertilizer—snip away any dead wood until you reach the sticky part of the stem. It will take three to four weeks for roots to form.
Which Heuchera does best in direct sunlight?
Heucheras have advanced significantly over the past 30 years. This family of native plants to North America has been repurposed by plant breeders into a brand-new class of essential perennials. There are now dozens of wonderful kinds available, with foliage colors ranging from butterscotch and lime green to burgundy and practically black.
Plant breeders have crossed several natural species, including Heuchera americana, micrantha, sanguinea, and villosa, to produce this new generation of heucheras. These heuchera hybrids feature very decorative leaf in addition to increased hardiness, vigor, and sun and heat tolerance.
What to Know About Heuchera
Heucheras are herbaceous perennials with a mounding habit and a height and width of around a foot. On lengthy stems that protrude from the plant’s base, the leaves are 3 to 5 inches across. Despite the fact that most of these plants are kept for their decorative foliage, most types also produce a lovely bouquet of flowers. These delicate, airy wands of cream, pink, or crimson bells are hummingbird- and cut flower-friendly. They are also the origin of the common name coral bells for heuchera.
Heuchera are perennials that do best in mild climates, however certain kinds don’t mind heat and humidity. Look for heucheras that have H. villosa or H. americana in their lineage if you garden in hardiness zones 7-8. These two species are both indigenous to the Southeast. The bigger, slightly fuzzy leaves of their hybrid progeny can generally be used to identify them. Examples include Fire Alarm, Georgia Peach, Caramel, and Southern Comfort.
Although most of them will also grow in full sun in the northern half of the country, heucheras thrive in morning or partial shade. The kinds with dark leaves, like Palace Purple, typically tolerate the sun the best.
Heucheras don’t like wet soil, for one thing. In the summer, damp conditions or excessive watering can cause the plant’s top to decay. Water-logged soil has the potential to freeze over the winter and uproot plants. Select a planting place with fertile, well-drained soil for optimal results. Pests and diseases rarely cause problems for heuchera plants. Mold or rot symptoms indicate that the soil is either overly wet or that the plants want improved air circulation.
During the winter, perennial herbaceous plants like heuchera wither away to the ground. Cut off any old leaves that are still clinging to the plant’s base come spring. You’ll get a lovely show of new foliage as a result. To keep the plants vigorous, divide them every three to five years.
How to Use Heucheras in Your Garden
Other shade-loving plants including ferns, hostas, dicentra, hellebores, astilbe, and spring bulbs pair well with heucheras. The majority of types do well in full sun in the north. Along with decorative grasses or low-growing evergreens, you may use them as ground cover or to fill up the front of a perennial border. Heuchera thrive in containers as well. Consider combining them with other unusual foliage plants like hakonechloa, carex, and oxalis.
How do you choose which heucheras to plant in your yard when there are so many different varieties? The Mt. Cuba Center in Delaware examined 83 heuchera species between 2012 and 2014. Citronelle, H. villosa ‘Bronze Wave,’ Cajun Fire, Color Dream, Steel City, Carousel, Apple Crisp, Frosted Violet, Southern Comfort, and Spellbound were among the top performers.
You might come across heucherellas, the near relatives of heucheras, when shopping for heucheras. These plants are a hybrid of heuchera and tiarella, or foam flower. Heucherellas blend the more vibrant foliage of heucheras with the higher moisture tolerance and disease resistance of tiarellas. Heucherellas are frequently simpler to grow than heucheras for gardeners in humid conditions.
Why is my Heuchera fading away?
- Choose a site with rich, moist soil that is well-drained, either in partial shade or full sun. It is ideal to have morning sun and afternoon shade.
- Turn the dirt under to a depth of 6 to 12 inches, remove any debris, and lightly rake the soil as level as you can to prepare the bed.
- All gardens benefit from the addition of organic matter (leaf mold, compost, well-rotted manure), which is crucial in recently developed communities.
- To lessen transplant shock, plant during gloomy weather or in the late afternoon.
- For each plant, create a hole that is sufficiently large to hold the root ball.
- To promote healthy root growth, unpot the plant and use your hands to gently release the root ball.
- Set the top of the root ball so that it is level with the dirt around it. Up to the top of the root ball, cover with soil. With your hand, forcefully press the earth.
- Use the plant tag to indicate its location.
- To save water and prevent weeds, thoroughly moisten the soil and sprinkle a thin layer of mulch (no thicker than two inches) on top.
How to Grow
- Keep weeds under control while the plants are growing. In order to suppress weeds, either cultivate frequently or apply a mulch to stop their germination. Weeds compete with plants for water, space, and nutrients.
- Mulches also support stable soil temperatures and moisture retention. When used as a mulch for perennial plants, weathered bark or finely chopped leaves give the bed a more natural appearance and, as they decompose over time, enrich the soil. Mulches should never be placed on a plant’s stems to avoid potential decay.
- Perennials need to be watered carefully to get them started. To encourage young roots to swell deeply, water thoroughly at least once each week. One inch or so below the soil’s surface, the soil should be wet. By placing your finger in the ground, you can verify this. Water in the early morning hours so that all of the leaves have time to dry. The majority of perennial plants need an inch of rain or weekly irrigation. Using a rain gauge, you can determine whether you need to add water.
- Some protection from strong winds and intense sunlight may be required until plants grow established. Additionally essential is good airflow.
- A mild fertilizer can be administered after new growth starts to show. To prevent burn damage, keep granular fertilizers away from the plant’s top and leaves. Use moderate amounts of a slow-release fertilizer because greater amounts could promote root rots.
- Heucheras should have a top dressing of compost in the spring, and the mulch should be replaced as needed.
- If you are growing for the flowers, deadhead for longer periods of blooming.
- When the cores of the crowns start to turn woody in the spring or fall, divide the plants. Replant the side shoots and discard the woody portion. When plants are content, they frequently self-seed.
Growing Tips
- Heucheras are excellent as a specimen plant or as a groundcover in woodlands. They look good as an edging or at the front of the border.
- Although many types are grown primarily for their display foliage, which brightens dark places, they also produce lovely flowers that are suitable for cutting.
Common Disease Problems
Botrytis: This fungus turns flowers, leaves, stalks, and buds a greyish color. It thrives in chilly, rainy weather. Burpee advises removing the damaged plant sections, avoiding watering at night, and not watering directly on the plant. Make sure plants receive adequate airflow. For advice on fungicides, get in touch with local cooperative extension service.
Cercospora Leaf Blight: Tiny flecks that first form on the leaves with a yellowish halo and then turn brown and combine. The leaves wilt and die as a result of them. Burpee advises getting rid of any plant detritus and diseased plants.
Downy Mildew is a fungus that eventually affects both sides of the leaves, causing pale gray areas on their undersides. Burpee Avoid overhead irrigation, it is advised. Don’t overcrowd plants and make sure there is enough air movement. When plants are damp, stay away from them.
Heuchera Rust: This fungus initially develops on older leaves, which can be mistaken for leaves that are dying naturally. On the undersides of the leaves, it develops the distinctive pustules that are rust in color. The spores develop inside the leaf and cannot be removed. The top of the leaf bears pock marks. This rust only affects its intended host, and it shouldn’t spread to other kinds of plants. Burpee advises removing and destroying any plant components that have been impacted as soon as possible. Avoid removing the growth points at any costs.
When the weather is humid, a fungus illness known as powdery mildew develops on the tops of the leaves. The surface of the leaves seems to be white or grayish, and they may curl. Burpee advises giving the plants adequate air circulation through optimum spacing and pruning in order to prevent powdery mildew. For advice on fungicides, get in touch with local cooperative extension service.
Common Pest and Cultural Problems
Aphids: These disease-transmitting sucking insects that feed on the undersides of leaves might be green, red, black, or peach in appearance. On the foliage, they deposit a sticky substance that draws ants. Burpee advises attracting or introducing aphid-eating predators like lady beetles and wasps into your garden. You can also use an insecticidal soap or a powerful spray to wash them away.
Rabbits: Rabbits frequently consume heuchera blooms.
Use a hot pepper wax spray or a repellant for rabbits, suggests Burpee.
Slugs: These pesky insects consume entire leaves or leave big holes in the vegetation. They feed at night, leaving a slime trail, and are especially problematic in wet weather. Burpee’s Advice Hand select, ideally at night. You can try using cornmeal or beer to lure the slugs into traps. Create a hole in the ground and fill it with a huge cup or bowl to serve as a beer trap. Make sure the object has steep sides so that the slugs can’t escape once they’ve finished. Beer should be poured into the bowl until it is about 3/4 full. The basin should be filled with drowned slugs by morning so that they may be emptied outside for the birds to consume. Put a spoonful or two of cornmeal in a jar and place it on its side close to the plants to create a cornmeal trap. Slugs are drawn to the smell, but since they are unable to digest it, it will kill them. Diatomaceous earth or even coffee grounds can be used to create a barrier around your plants. They are too big to crawl over these.
Heuchera may experience sunburn if exposed to strong sunlight during the day.
Be sure to position your plants so that they are shielded from the afternoon light, advises Burpee.
Vine Weevil: This insect makes irregular slits in the leaf margins, and its grubs feed on the roots of plants, sometimes killing them. Adults measure about 5/16 inches in length, are matte black, and have dirty yellow markings on their wing covers. The grubs have light brown heads, are c-shaped, and measure 3/8 inches long. Burpee advises picking out the adults at night and shaking the plants over newspaper to move them. In the daytime, they hide under pots; check there. For advice on which pesticides to use, contact your cooperative extension service.