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Physocarpus opulifolius, known as common ninebark, Eastern ninebark, Atlantic ninebark, or simply ninebark, is a species of flowering plant in the rose family Rosaceae, native to eastern North America. Incidence of infection increases as relative humidity rises to 90 percent, but it does not occur when leaf surfaces are wet (e.g., in a rain shower). We embody the University's land-grant mission with a commitment to eliminate hunger, preserve our natural resources, improve quality of life, and empower the … Occasionally powdery mildew can become a problem and some cultivars are bred to have a greater resistance. There is an easy way of identifying this kind of common plant disease by looking for small and dark spots that are raised occurring on leaves of plants. Common Ninebark Physocarpus opulifolius. A change of weather and the right growing conditions will reduce future problems. Add to this that the shrubs are deer, rabbit, and disease resistant, and drought, heat, and humidity tolerant, and you’ve got the perfect plant. Provide adequate air circulation by properly spacing … It's not fussy about soil, either--a little sand to a little clay works fine. Although it’s not particularly susceptible to diseases or pests, however, there is a chance of encountering the following issues when you cultivate ninebark. Ninebark is easy to take care of, and most gardeners don’t have to struggle with pests or diseases when they’re growing a ninebark shrub. Wood Rots and Decays (Many genus and species involved) Hardiness Zone: 2 - 6 Mature Height: 5-10 Feet Mature Width: 5-10 Feet Features: Physocarpus opulifolius (Common Ninebark) is a fast-growing, upright, spreading, deciduous shrub with an exquisite fountain shape and incredibly decorative exfoliating bark. The Ninebark is a very versatile and tough shrub which will grow in a variety of site conditions. Diseases and pests: Ninebark does not have any significant diseases or pests. A native to Minnesota and hardy as far north as USDA Zone 2, common ninebark (Physocarpus opulifolius) grows up to 10 feet tall with green to greenish yellow leaves. Ninebark will thrive with little or no water, and will endure standing in it. Ninebark (Physocarpus) is a flowering shrub that should be in almost every northern garden. It is fast-growing, insect- and disease-resistant, and drought-tolerant. The weather conditions have been right for this disease to occur. Leaf Disease identification:. Common Ninebark, flowers of the cultivar ‘Diablo’ ... Environmental Damage. Drought Drowning and Edema Fungal Disease. Common Ninebark has "perfect flowers," meaning that both male and female parts are contained on a single flower. While adaptable to a wide variety of soils and mositure levels, the Ninebark is most at home along the edges of wetlands or stream banks. I have seen quite a bit of powdery mildew on ninebark this spring. Profuse creamy-white flowers, delicately pink-tinged, appear in dense, rounded clusters in late spring before they give way to drooping clusters of red fruit in fall. Three plants are recommended for a reliable fruiting. Young, succulent growth usually is more susceptible than older plant tissues. Therefore, the disease is common in crowded plantings where air circulation is poor and in damp, shaded areas. Many farmers may be wondering why some plants in their gardens may be having leaves appearing as though they have dark patches. The male and female flower parts develop in sequence, and the flowers themselves are self-infertile. Propagation: Easily propagated from seed, cuttings, or bare root (4). Parts develop in sequence, and the right growing conditions will reduce future problems why some plants in their may... Many farmers may be wondering why some plants in their gardens may wondering... 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