It thrives in zones 5-9. As a secondary result of their feeding, a fungal growth called sooty mold may develop. Make Baby Plants! Kousa Dogwood should be planted in place of Cornus florida where Discula anthracnose is a problem. It is a plant native to East Asia including Korea, China and Japan. Prevention is as simple as maintaining well-drained, acid soil and avoiding accidental injuries, which provide entry points for fungal pathogens. A good rule of thumb is to allow the top layer of soil to dry out before watering again. How to Control Lilac Borers. In the landscape, the disease can be kept in check with fungicides. The dependable Cornus kousa, often called Chinese Dogwood, Japanese Dogwood or Kousa Dogwood, has demonstrated excellent resistance to both the dogwood borer and anthracnose disease. Cornus kousa Chinese dogwood. Kousa dogwoods, for instance, are very resistant to many of the problems that affect flowering dogwoods. Adding too much nitrogen through fertilizers can reduce flowering of these trees. If you want to give a droopy-leaved sapling a boost, mix 1 to 2 cups of a gentle, organic fertilizer into your compost-soil mix during transplanting; no additional feeding required. These small insects display bodies in the shape of a pear in a wide variety of colors, such as green, yellow or black. Some shade will improve performance in restricted soil spaces. A Kousa Dogwood Tree. Dogwood Problems; Symptoms: Probable Cause: Leaves Spotted; Dieback; Cankers: Dogwood Decline: Slow Growth; Pale Foliage: Root Competition : Tunnels Under Bark; Branches Girdled: Dogwood Borers: Small Bumps On Leaves And Branches: Scale Insects: Sunken Spots On Leaves: Spot Anthracnose: Leaves Stunted; Swellings On Trunk/Roots: Canker: Flowers; Leaves Or Twigs Wilt: Blight Dropped fruits can ferment and attract yellow jackets. Growing, Selling and Propagating Silver Dollar Hydrangea, The Perfect Plant for a Shady Garden, Jack Frost Brunnera. Some shade will improve performance in restricted soil spaces. Damask holds a Master of Arts in English and creative writing from the University of North Texas. Some shade will improve performance in restricted soil spaces. The attractive C. kousa is native to Japan, China, Korea and Taiwan. Other pests and diseases are usually not problems, and deer normally leave these trees alone. “Gold Star” has a golden stripe down each leaf in the spring, which darkens to a solid green later in the summer. Origins: This dogwood is one of a series bred at Rutgers University, named the Jersey Star series. The Asian Dogwood is often described as a large shrub because of its multi-stemmed habit rather than having a single trunk. It is not rated as an urban tough tree and needs open soil space to look its best. Suckers may need to be removed to maintain plant width. They grow best in full sun. Though often worse on young or weak trees, this soil-borne disease can also affect healthy dogwoods. Dogwood is deciduous. Larvae display creamy-hued bodies with a dark head and a mature length of approximately 3/5 inch. Cornus kousa ‘Summer Gold’ Summer Gold Dogwood. Kousa Dogwood should be planted in place of Cornus florida where Discula anthracnose is a problem. The adults may be seen running over the bark of trees and fly when disturbed. If you are looking for such a tree, then try planting this. Though similar, cercospora spots are light brown with an irregular shape and indefinite edges while septoria spots are deep brownish purple. This is true with a host of fungal and bacterial diseases of dogwood or tiny insects that may infect or infest your dogwood tree. Pink Diamond Hydrangea, Growing, Selling and Propagating this Amazing Plant. Adults -- deep blue moths -- lay eggs in injured areas of tree bark. The following describes propagation methods for Kousa dogwood, the tree’s root system, preferred soil types, cultivars, damaging agents and pests, allegenic potential, and uses. One of the reasons we love these plants as they age is that they develop what's called exfoliating bark. Planted a Kousa dogwood, about 5 feet tall, bought at Home Depot in March. It is important to carry out a soil test to determine the nutrients that the soil is deficient in. Control includes maintaining healthy, uninjured trees and the application of pesticides, such as pyrethroids, every two weeks during the summer. Comments Beautiful flowers, fruit, fall color, and nice winter silhouette provide year-round interest. Cornus kousa: Kousa Dogwood 2 Leaf color: green Fall color: purple, red Fall characteristic: showy Flower Flower color: white/cream/gray Flower characteristics: very showy Fruit Fruit shape: oval, round Fruit length: .5 to 1 inch Fruit covering: fleshy Fruit color: red Fruit characteristics: attracts birds; showy; fruit/leaves not a litter problem To control this problem, gardeners should remove and destroy the affected tree. As midges feed, galls, or swellings, form on surrounding plant tissue, sometimes causing twig death. Insects, Diseases and Other Plant Problems: Calico scale, dogwood borer, dogwood sawfly, Japanese maple scale, leafhoppers, oyster shell scale. For more severe infestations, saturating dogwood trees with neem oil offers effective control. For example, one recent introduction features bright orange fruit instead of the more common red fruit. Spores are spread by wind to surrounding dogwoo… More resistant to drought than flowering dogwood. A Chinese Dogwood tree, botanical name Cornus kousa, that fails to bloom or make flowers of any kind is a very common problem. Gardeners should irrigate soil during dry, warm weather to keep the soil moist without creating waterlogged conditions. Infected leaves exhibit marginal leaf scorch, dead patches, reddish discoloration, yellowing and premature defoliation. The hatched larvae, also orange, tunnel into kousa dogwoods by entering the base of the tree's leaves. History and Origin of the Pink Kousa Dogwood. Cornus kousa ‘Summer Gold’ is a small upright tree growing erect when young and becoming broader as it matures. Fall foliage is a showy red color. Jersey Star dogwoods are crosses between Pacific dogwood (Cornus nuttallii) … The larvae of a clear-wing moth, this caterpillar tunnels into the trunk of the tree and eventually girdles the tree. Flowering dogwood (Cornus florida) and the Kousa dogwood (Cornus kousa). The tree usually dies in three to five years. Cause: Spot anthracnose is a fungal disease that targets dogwoods. Though technically edible, they're best left for the birds and other wildlife foragers. The issues affecting dogwood trees are too numerous for this writing, but we can cover some of the most common dogwoo… The kousa dogwood (japanese dogwood) can be expected to grow in Hardiness Zones 5–8. Some yellow on leaves. Here’s the problem, this is where the plan went wrong. Lower leaves on the tree are the first to be infected. Cornus Kousa 'Satomi' from Burncoose Nurseries FLOWERING DOGWOODS | available online to buy - Information: deep pink bracts. Disinfect pruning equipment by dipping it in a solution of hot water and household bleach. Native geographic location and habitat. With a preference for moist, well-drained loam soil with an acid pH, these trees will continue to grow successfully in neutral or alkaline conditions. Weakened trees are more susceptible. Kousa dogwood (C. kousa) and hybrids of kousa and native dogwood (C. florida) are resistant to anthracnose and decline and should be used to replace dying trees. Dogwood Leaf Scorch Leaf scorch is a common problem in dogwood tress, and a sign that your tree is under water stress. Very showy in late spring. Mulch helps to acidify soil, deter weed growth and conserve moisture. It is not rated as an urban tough tree and needs open soil space to look its best. The disease, Discula destructiva, causes leaf, twig and branch dieback beginning in the lower part of the tree. Special accent. Areas beneath aphid feeding sites may become saturated with honeydew, a sticky-sweet secretion these pests release while eating. Rake and destroy fallen leaves. Flaking can sometimes be accelerated on the south sides of a tree as this side freezes and thaws during the winter. It is typically planted for both its visual interest and profusion of spring flowers. Kousa dogwood trees are susceptible to scorch, particularly during windy periods when the weather is warm and dry. Cornus kousa is a pretty problem-free tree in most places. Gardenerdy tells you how to grow and care for your Kousa Dogwood. These dogwoods aren’t especially fast growing – perfect for the smaller yard and garden. While these deciduous trees often escape problems such as dogwood anthracnose and powdery mildew, they are not immune to health issues. chinensis, which is the Chinese form of a tree that was first described from Japan and Korea. Sollten Sie nach wie vor Bedenken hinsichtlich Cornus satomi haben, fehlt Ihnen vielleicht bloß die Lust, um den Problemen den Gar auszumachen. Kousa dogwoods thrive in areas of the garden that offer full sun to partial shade. Cornus kousa is a small deciduous tree 8–12 m (26–39 ft) tall, in the flowering plant family Cornaceae.Common names include kousa, kousa dogwood, Chinese dogwood, Korean dogwood, and Japanese dogwood. Autumn leaves have red-scarlet tints. You are buying 1 Cornus kousa Dogwood Tree 12-18 in a quart pot. Branches die back and trees may die. Kousa dogwood is in demand for its grower friendliness and is an excellent substitute for the common flowering dogwood, particularly since it is resistant to the dogwood borer and dogwood anthracnose problems that have plagued the common dogwoods in recent years. Phantom Hydrangea, Hydrangea paniculata ‘Phantom’. Spider Mites on Leyland Cypress. The C. kousa is grown for its flowers in addition to its hardy, dependable nature. The bright green foliage has golden yellow margins through the growing season, becoming pink in the fall prior to the entire leaf turning bright red. aka Kousa or Asian Dogwood. No spots on leaves, but leaf almost looks like it is folded up. The honeydew encourages the growth of the black-hued sooty mold, which is messy and may block sunlight absorption when it covers plant foliage. A Different, Simple Landscape Design Idea. It's more of a problem for understory trees than trees growing out in the open. Powdery Mildew: Erysiphe pulchra (formerly Microsphaera pulchra) is the fungus that attacks leaf surfaces and tender shoots and causes powdery mildew. If you've been afraid to plant a Dogwood tree for fear of disease and/or borer problems, fear not. In addition to the heat, high winds contribute to scorch, as frequent gusts damage dry foliage and bark. Though they bloom later, they have equally gorgeous flowers, edible fruits, and colorful fall foliage. On dogwood, it can be a serious problem on young trees that are planted too deeply and on stressed, older trees. Apply a thick layer of mulch to keep root zone cool in summer. Kousa Dogwood is a small ornamental tree that makes for an excellent and beautiful landscape for your home all year round. © Copyright 2020 Hearst Communications, Inc. Do not prune when the tree is flowering in the spring, or you will make it vulnerable to dogwood borers, one of the very few pests that seriously affect it. Masses of creamy white flower-like bracts cover the tree during bloom. Lookalikes: Root rots, borers, crown canker It is not rated as an urban tough tree … Habit: Venus dogwood is a small ornamental tree that reaches between 15 and 20 feet tall with an equal canopy width. Blütenhartriegel (Cornus kousa) – Pflege, Schneiden. Prune when the kousa dogwood is dormant, in late fall or early winter. The Cornus kousa (Korean Dogwood or just Kousa) tree is more resistant to diseases that plague other dogwoods. Disease, pests and problems. Dropped fruits can ferment and attract yellow jackets. What you are seeing is a natural part of how Cornus kousa trees develop. Too much fertilizer can injure dogwood trees and it isn't really necessary. As the flowers age, reddish pink fruits develop. Kousa dogwoods are also susceptible to crown canker disease, caused by the fungal pathogen Phytophthora cactorum. Borers and leaf spots. Salt sensitive. Der Mulch kann dem Boden, während er sich zersetzt, Stickstoff entziehen. Est.10yr.growth. Pruning: Regular trimming isn’t necessary with Kousa dogwood, but you may want to selectively prune your tree in order to show off the dramatic branches and bark. Dogwoods are a diverse group, however, so ornamental traits and practical traits (such as summer-heat tolerance, hardiness, and bloom time) are being worked on to create new and better plants. The dogwood … Pest problems may include the usual culprits such as aphids, leafhoppers, weevils and scale insects. Origins: This dogwood is one of a series bred at Rutgers University, named the Jersey Star series. Problems With the Eastern Redbud. Deciduous Tree A fantastic tree for Pacific Northwest gardens. 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