The annual deep red buds open to white flowers. ‘Molten Lava’ – This tree has a weeping form and grows about 15 feet tall and 12 feet wide.The pink buds open to white flowers, and the fruit are bright red, grow to 3/8” in diameter and are persistent. ‘Donald Wyman’ – This tree grows to 20 feet tall and wide with a rounded growth habit. ![]() It has good resistance to scab, and excellent resistance to rust, powdery mildew and fire blight. The red buds open to rose-red flowers, the fruit grow to 5/8” in diameter and are glossy cherry-red. ‘Centurion’ – This tree grows 25 feet tall and 15 to 20 feet wide.It has excellent resistance to scab, rust, powdery mildew and fire blight. It has a strong upright form and a heavy flower display. The annual red buds open to white flowers, and the fruits are orange-red and grow to ½” in diameter. ‘Adirondack’ – This tree grows 18 feet tall and 10 feet wide.It has excellent resistance to scab and rust, good resistance to powdery mildew, and good to excellent resistance to fire blight. The annual buds are red, the flowers are dull pink, and the fruit is red, persistent and grow to 5/8” in diameter. ‘Adams’ – This tree grows 20 to 25 feet with a round growth habit and greenish-red foliage.The following list represents some that are more disease-resistant. Over 800 cultivars are known, with more being developed each year. It has good disease resistance, although it is slightly susceptible to scab, fire blight and leaf spot. ![]() sargentii) – This is a mounded, densely branched, shrubby species, growing 6 to10 feet tall. The buds are dark pink, turning to white flowers and small red fruit. It is vase-shaped and grows 20 to 25 feet in height and width. hupehensis) – This is one of the most elegant crabapples. It is slightly susceptible to scab and powdery mildew and moderately susceptible to fire blight. It is an annual bloomer with red buds that open to white flowers. floribunda) – This is an old favorite introduced from Japan in 1862. For more information on disease and insect problems on crabapples, refer to HGIC 2000, Apple & Crabapple Diseases HGIC 2001, Apple and Crabapple Insects HGIC 2208, Fire Blight of Fruit Trees and IC 119, Insect & Disease Management for Home Grown Fruits & Nuts. Disease resistance means that infections are few, do not progress very far or do not occur. It is important to use a cultivar that has been proven to be resistant in the area where the tree is to be planted. Cultivars highly susceptible to leaf spot may experience complete defoliation by late summer. During springs with abundant rainfall, fire blight and rust may become significantly worse, and during summers with abundant rainfall, foliar leaf spots may become significantly worse. Resistance to fire blight, powdery mildew, rust and apple scab varies, depending on the cultivar of the tree and where it is grown. ProblemsĬrabapples may be susceptible to fire blight, powdery mildew, cedar-apple rust, cedar-hawthorn rust, apple scab, several leaf spots, canker diseases, Japanese beetle and caterpillar foliar feeding, borers, scale and aphids. Do this in late winter or early spring before bud-break. Pruning is recommended for opening the center of the plant to air and light, removing unwanted branches, shaping the tree and removing suckers. While it requires medium fertility, over-fertilization may make it more susceptible to fire blight. The soil should be moist, slightly acid (6.0 to 6.5 pH) and well drained. The tree is adapted to most sites, but should be placed in full sun for best flowers and fruit. Large-fruited types, such as ‘Callaway,’ can create maintenance problems with rotting fruits falling to the ground. However some cultivars will retain their fruit (persistent) on the tree throughout the winter. A characteristic of many crabapple cultivars is that the fruit will drop upon ripening. Because of its small stature, it is a good selection as a street tree under utility lines. The crabapple can be used in a home landscape as a specimen or patio tree. The unusual branching of most crabapples creates a strong silhouette in winter when the leaves are absent. Some crabapples have outstanding fall color, while others do not – it depends on the cultivar. While all crabapples are edible, fruit of many ornamental crabapples are not palatable without first cooking and sweetening the fruit. The color of the fruit may be red, yellow or green. The fruit, which appear in summer, vary in size, but are less than 2 inches in diameter (fruit larger than 2 inches are considered apples). Some crabapples bloom heavily only every other year. The blooms, which come out before or with the leaves in the spring, range from white to red. The ornamental flowering crabapple is valued mainly for its flowers and fruit. Joey Williamson, ©2013 HGIC, Clemson Extension Malus ‘Donald Wyman’ (crabapple) flowers.
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