Heuchera sanguinea, commonly called coral bells, is an herbaceous, clump-forming perennial that typically forms a basal foliage mound to 8-10” tall.Foliage is evergreen in warm winter climates. Bacterial and fungal leaf spots, Botrytis, Japanese beetles, powdery mildew, and strawberry root weevils may occasionally, but not usually, become problematic. 'Red Lightning' heuchera has electrifying dark red veins networked over huge gold leaves that are sure to grab attention in the garden. Diagnosing Heuchera Disease There are some pretty clear signs of trouble with Heuchera that will help you spot and target health issues as quickly... Discoloration of leaves or petals is a good, easy-to-spot sign of trouble. Coral bells have been known to uproot from the soil as a result of fluctuating soil temperatures. Heucheras have become a staple of garden and container designs across the Pacific Northwest. Besides traditional green-leaved coral bells, new varieties of heuchera have leaves in shades of p… Xanthomonas produces yellow rings, or halos, around small brown spots that appear on the leaves. Occasionally in northern regions, heucheras have a tendancy to heave out of the ground because of the freeze/thaw cycle. What have been the best performers in your garden? Caramel, plum and lime foliage that provides year round interest just can’t be beat. We now have heuchera ready for purchase from the new Cade Street Nursery online store , all grown at our own Nursery in Heathfield. One of our favorite things about their foliage is the way it can change with the seasons. In the spring, if the plants have heaved at all, the new roots will grow into the fresh new layer of compost. Heuchera ‘Lime Marmalade’ Heucheras are native to the woodlands of North America. During winter, frost heave can occur, where the soil’s freeze-thaw cycles shoves plants out of soil, exposing plant roots to freezing temperatures. Coral Bells (Heuchera) Plant Health Problems See Perennials for a detailed discussion of problems that may occur and are common to most herbaceous ornamentals. Place the top of the … The two main problems with heucheras are rust and vine weevils. The latter is actually a marriage of Tiarella and Heuchera and has the same great foliage color but more pronounced bottlebrush-shaped flowers. Noteworthy Characteristics. This is best done in early fall. Some cultivars may get leaf scorch when they are planted in hot, full sun. Companion Plants: The compact habit and mounded form of Palace Purple Coralbells makes it a versatile plant for any space needing an extra splash of color. Required fields are marked *. The most common pests of coral bells are strawberry and black vine weevils. Heuchera 'Fire Alarm' is a striking cultivar of Coral Bells with its foliage of thick, leathery leaves changing color throughout the seasons. In spring, the large glossy leaves emerge bright red, then deepen to brown-red during the summer before turning fiery red in fall. Pests and Diseases: Generally, they can be grown without any insect or disease problems. … Most varieties are frost hardy and have a thick, shallow root system. While walking the garden recently we spotted the signs of rust, a fungal disease found on Heuchera and its close relatives. (Coral bells) get both fungal and bacterial leaf diseases. They spread slowly, so are best in groups for maximum impact – different varieties will create a patchwork effect. Once you spot rust the best approach is to remove the infected foliage. Heidi’s enthusiasm and knowledge of her filed has helped spark a new passion for these retired folks!” —Bob & Kathy H. (issaquah), (360) 863-3224info@sublimegardendesign.com, 2801 Bickford Ave, PMB 107, Suite 103 Snohomish, WA 98290. have had good luck with ‘Obsidian’, ‘Berry Smoothy’, some of the silver-leafed varieties like ‘Silver Scrolls’. Plant heuchera with other shade-loving perennials such as astilbe, iris and bleeding heart. To date, it has not been known to affect any other plants. We have had good luck with ‘Obsidian’, ‘Berry Smoothy’, some of the silver-leafed varieties like ‘Silver Scrolls’. Downy mildews typically cause leaf spots with downy white or gray patches under the leaves. Many of the problems with coral bells can be prevented, or caused, by how you care for them. They tend to grow in dense clumps and have brightly coloured foliage. Remove infected leaves and discard them instead of composting. Heck, I’ve even raked them right out of the ground when removing leaves. Heuchera 'Forever Purple' Purple leaves with dark purple veins. Heucherella is a low feeder, but the plant benefits from regular applications of a water-soluble fertilizer mixed at half strength. Coral bells are susceptible to some problems. 'Melting Fire' heuchera plants feature deeply ruffled foliage that varies from crimson to purple, depending on the season and light exposure in the garden. Heuchera have pretty awful root systems on established plants. Though not necessarily fatal, it can be unsightly when dark spots form on the upper surfaces of the leaves with orange splotches on the undersides. Short purple pink flowers in spring. If you are interested in adding some inviting & outstanding colors for your garden, heuchera plants (coral bells) are a perfect choice. Making low, flattened mounds of foliage and excellent for filling in gaps between taller plants, heucheras provide colour virtually year round. To fix the problem we must change the circumstances that led to it. To avoid these issues, plant coral bells in an area with well-draining soil and water them midmorning so the plants do not remain wet too long. Labeled as Evergreen plants, Gardening tips, Heuchera, Plant problems. Heuchera is resistant to deer and most insect pests, though heuchera rust can be a problem in humid conditions at temperatures of 45 to 50 degrees F. The remedy is an antifungal spray containing copper. Next is the shade/sun issue. Heuchera vs. Heucherella: Close cousins, and from the same plant family (Saxifragaceae), are foam flowers (Tiarella) and foamy bells (Heucherella). Watch for soil heave in changing temperatures; this happens when the ground freezes and thaws, eventually pushing roots up out of the ground. The adult weevils feed on the leaves of plants, leaving small holes. Your email address will not be published. The larval stage of the weevil is an off-white color and feeds on the roots of the coral bells, which can cause the above-ground parts of the plant to die. Recently moved from Florida, we were new to NW gardening. Xanthomonas causes small brown angular to circular spots with yellow halos. And as an added bonus, they are low maintenance! © Copyright 2020 Hearst Communications, Inc. Sublime Garden Design is a full-service boutique landscape design firm serving Snohomish County, Seattle, and surrounding areas. Hi Leonard - heucheras can be very susceptible to vine weevil damage, especially if they're in pots. Most part shade plants do well in quite a bit of sun in zone 5, but not Heuchera, well not lots of them anyway, but they also don't seem to want to grow much in shade, being little shrimpy things. Few pests or diseases bother these deer-resistant beauties, although leaf scorch can be a problem for coral bells in hot, full sun. Symptoms first appear as depressed brown spots on the topside of the leaf. Small bell-shaped flowers on tall stems attract hummingbirds and make nice cut flowers. Unpot the plant and gently loosen the root ball with your hands to encourage good root growth. Possible Problems with Insects. In shadier sites, consider using Rozanne Geranium, Hostas, Astilbe, or Sedges. Rust can also occur on coral bells. You'll probably need to divide every three to four years. Heuchera, also known as coral bells, are adaptable perennials that grow in U.S. Department of Agriculture plant hardiness zones 3 through 10. Got a moist spot in the garden with bad airflow? Do you have a plant that you are having problems with? The plants can become sunburned if exposed to direct sun during the heat of the day, so choose an area with morning sun and part shade in the afternoon. Funny thing is that some of my light colored ones do just great in lots of sun, while the darker ones fade or crisp. Symptoms first appear as depressed brown spots on the topside of the leaf. The genus name Heuchera is a reference to the German botanist and physician Johann Heinrich von Heucher. Although the flowers are lovely, they pale in comparison to the foliage. Prune out and clean up dead foliage to keep the fungus from over wintering. Coral bells have small, delicate flowers that form on long stalks and attractive scallop-shaped leaves. Pseudomonas causes "reddish" brown spots that may cause the leaf to distort. To combat heaving, add an extra layer of compost around the plant's roots in the fall. Because the Heuchera cultivars we find in garden centers are hybrids from up to five different parent species we see great variation in disease resistance and plant performance. Bacterial diseases are more likely in areas of high humidity, poor air circulation, poor soil drainage and in stressed plants. Keep the soil around your plants free from debris to prevent insect and disease problems. It has quickly become far more common over the last decade. There should not be any problems with insects when it comes to growing Heuchera, but sometimes they can be attacked by Japanese beetles. for updates, tips, and gardening insights, Sublime Garden Design | Landscape Design Serving Snohomish County and North King County. University of Illinois Extension: Heuchera -- Coral Bells, University of California Statewide Integrated Pest Management Program: Powdery Mildew on Ornamentals, University of Illinois Extension: Diseases of Heuchera, University of California Sonoma County Master Gardeners: Heuchera, University of Wisconsin Extension: National Garden Bureau's Perennial of the Year 2012: Heuchera, University of Minnesota Extension: Bacterial Leaf Disease of Foliage Plants, The University of Georgia Cooperative Extension: Heuchera, University of California Statewide Integrated Pest Management Program: Nematode Application Tips, University of Washington Botanic Gardens: Gardening Answers Knowledgebase. It is a strain of fungal rust which affects only heucheras and is properly called Puccinia hucherae. Domenghini also served as an education specialist for the National Gardening Association. Over time, these clumps may become bare in the center and have woody stems indicating it's time to divide the plants. if a plant requires cool/cold rest periods it makes for a poor house plant. Cynthia Domenghini holds a Ph.D. and bachelor's degree in horticulture, as well as a master's degree in teaching. Although Heucheras are typically trouble free plants here in Washington, they can be prone to a few pests and diseases. The worst insect pest of the heuchera-tiarella group is the Black Vine Weevil, Otiorhynchus sulcatus. Say hello to fungal problems! Moving them to a different site should solve this. Prune off old tattered foliage in late winter increases airflow around the stem and allows fresh new foliage to take its place. Increase airflow in your garden by not spacing plants too closely together. Mealybugs, Planococcus citri, can devastate Heucheras by sucking the life out of them. Coral bells have small, delicate flowers that form on long stalks and attractive scallop-shaped leaves. Inspect new plants for rust before introducing to your garden. Heuchera produce small bunches of flowers that grow on long stalks. Post your question below and we may just answer it in one of our upcoming posts. Coral bells often have problems with powdery mildew, which shows up as a white, powdery growth on the leaves,... Pests. When you flip the leaf over you will find a raised bump with orange rust spores. Here on our blog, we'll share our expertise, discoveries, and the gardens we love. Having tossed far too many of these pricey treasures into the yard waste (NEVER compost diseased plants) I asked Dan Heims, president of Terra Nova Nurseries, Inc. for some ideas on what I could do to save those that I have and ask about the new disease resistant hybrids his nursery is breeding.. As a breeding company, Terra Nova Nurseries, Inc. is the leading innovator for new Heuchera … When you flip the leaf over you will find a raised bump with orange rust spores. Avoid crowded plantings as this reduces air circulation. "Plants that are too moist and shady may get some fungus problems during the summer. In early-mid summer, panicles of small, bell-shaped, pink flowers, borne on reddish stems, rise up to 13 in. The young ones chew through the roots and leave the plant 'detached'. She spent several years researching health outcomes of school gardening and has written numerous youth garden curricula and activity guides. Heuchera are native North American plants that are at home in rock gardens, borders, woodland, containers and when used as ground cover. If so, read our article till the end for proper growing & care tips. Keeping the plants well mulched can help prevent this from happening. Bacterial diseases can develop on coral bells, leading to brown spots on leaves. Like many fungal problems in the Pacific Northwest, air circulation, humidity and moisture play a big roll in rust infections. Don’t allow the plant to become badly wilted, but be careful not to overwater, as heucherella is prone to rot in soggy, poorly drained soil. We typically see it in late spring or early summer around the Seattle area when things are moist and humid. They also make great border plants for year-round color. Heuchera, commonly called coral bells or alumroot, is a genus consisting of about 55 species of evergreen to semi-evergreen herbaceous perennials which are all native to North America. Unfortunately there are no conclusive lists on Heuchera cultivars resistant to rust. But what do we do to protect our Heucheras? Heuchera, otherwise known as coral bells, are evergreen perennial plants that come in a variety of vibrant shades, and are a fantastic way to add some texture and tone to a garden. Diseases of Heuchera sp. While plants are mainly grown for their foliage, inconspicuous flowers in summer add to … A good landscape design and irrigation program along with proper sanitation will go a long way to preventing such problems. The plants form in clumps that can be 6 to 12 inches tall and 12 to 24 inches wide. Heuchera plants form round mounds with a woody rootstock or crown at their base. Psuedomonas appears as reddish-brown spots and may cause leaves to become abnormally shaped. More about us... “Finding Heidi & Sublime Garden Design was a true stroke of luck for us. Watering overhead should be done early in the morning allowing time for the foliage to dry out during the day. A very special heuchera with next-level color! Their leaves are rounded, lobed, hairy, and evergreeneven when covered in snow. Mine will inevitably heave from even mild winter frost. (Coral Bells) Heuchera sp. Diseases caused by Fungi: Downy mildew, Plasmopora spp. Although this fungus is not likely to kill your plant the damage to the foliage is quite unsightly. Coral bells (Heuchera) is a traditional foliage plant that has had many newer varieties. Plant on a cloudy day or in late afternoon to reduce transplant shock. Botrytis produces larger brown spots. Utilize a drip irrigation system instead of overhead sprinklers to reduce moisture on the foliage. Diseases are not expected either, though occasionally they can get powdery mildew and fungal diseases such as leaf spot and scorched leaves. Oftem you see nothing until the plant just collapses. Diseases. Coral bells often have problems with powdery mildew, which shows up as a white, powdery growth on the leaves, shoots and sometimes on the flowers. Plants grow in a variety of different habitats including woodland areas, … Avoid high-nitrogen fertilizers, which can cause spindly growth. Heuchera. Heuchera Problems Characteristics. Like other coral bells, Heuchera ‘Citronelle’ prefers soil with ample organic matter worked in prior to planting. Your email address will not be published. Female weevils lay their eggs in plant debris around the coral bells. Heuchera Rust is a relatively new problem in the UK, first identified in 2004. Dig a hole for each plant large enough to amply accommodate the root ball. Practice good garden hygiene by cleaning your tools and gloves once your done. This site uses Akismet to reduce spam. Learn how your comment data is processed. This damage is not necessarily fatal to the plant but can be unsightly. These problems may be characteristic of the natural development of coral bells over years of growth or can be symptoms of damage caused by diseases, pests or incorrect care. They thrive in shade and make great groundcover plants. Organized under Education, Garden Maintenance, Garden Tips & Advice, Plant DIseases. Where to Plant. Prevent this by applying a layer of mulch over the roots during fall and winter. Although Heucheras are typically trouble free plants here in Washington, they can be prone to a few pests and diseases. While walking the garden recently we spotted the signs of rust, a fungal disease found on Heuchera and its close relatives. Common name: Coral bells. Cool fall and winter weather bring on rich saturated colors, new spring new growth is fresh and vibrant but what happens when the onset of summer brings spots and problems? The good news is that this rust does not spread to other plants in your landscape. Dainty white flowers characteristic of the genus appear in late spring on 18-inch stems, and may endure for two months. Outstanding resistance to foliar diseases and pests. Most varieties of heuchera are very drought-tolerant. Heuchera Bare Root Plants: Tips On Planting Bare Root Perennials By Bonnie L. 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