A large showy shrub for all seasons. Huge white blooms in summer turn pink in fall. Large, green, oak-like leaves turn reddish purple in the fall. Provide room for this showy plant to grow. Excellent for foundation and mass plantings and as a specimen plant. Maturing to a height of 8'-12'. An Oklahoma Proven Selection.

Plant Profile
Botanical Name Hydrangea quercifolia
Features A large showy shrub for all seasons. Huge white blooms in summer turn pink in fall. Large, green, oak-like leaves turn reddish purple in the fall. Provide room for this showy plant to grow. Excellent for foundation and mass plantings and as a specimen plant. Maturing to a height of 8'-12'. An Oklahoma Proven Selection.
Exposure Sun to shade
Hardiness Zone USDA Zones 5 to 9
Mature Size 8' Tall, 12' Wide
Genus Description Hydrangea is a genus of 80 or more species of deciduous and evergreen shrubs and climbers, rarely trees, found in wood­land in E. Asia and North and South America. Grown mainly for their large, showy flowerheads, many hydrangeas also have ornamental, flaky, peeling bark when mature, and attractive foliage with' good autumn color. The leaves are broadly to narrowly ovate, or lance­shaped, toothed, and either opposite or in whorls of 3. The flat, domed, or conical, terminal flowerheads consist of corymbs or panicles of both tiny fertile flowers and larger sterile flowers with showy, petal-like sepals. Hydrangea quercifolia (Oakleaf hydrangea) is a deciduous, mound-forming shrub with attractively peeling, orange-brown bark and deeply 5- to 7-lobed, mid-green leaves, to 8in (20cm) long, turning bronze-purple in autumn. From midsummer to autumn, bears conical panicles, to 10in (25cm) tall, of white fertile and sterile flowers; the sterile flowers become pink-tinged with age. Flower color is affected by the relative availability of aluminum ions in the soil. Acidic soils with a pH of less than 5.5 produce blue flowers; soils with a pH greater than 5.5 produce pink flowers. White flowers are not affected by pH. Hydrangeas are useful for a range of garden sites: they are excellent as specimen plants or in group plantings, in a shrub border, or in containers. Use the climbers to clothe a shaded wall or fence, or grow up tree trunks. The flowerheads may be dried for use in arrangements. All parts of hydrangeas may cause mild stomach upset if ingested; contact with the foliage may aggravate skin allergies. -From The American Horticultural Society A-Z Encyclopedia of Garden Plants
Care Tips
Cultivation Grow in moist but well- drained, moderately fertile, humus-rich soil in sun or partial shade; provide shelter from cold, drying winds. Some hydrangeas become chlorotic in shallow, alkaline soil. Pruning should be done in late winter or early spring, when dormant; some in late summer or early autumn to prevent bleeding of sap. Remove wayward or crossing shoots to maintain permanent, healthy framework.
Pests and Diseases Gray mold, slugs, powdery mildew, rust, ringspot virus, and leaf spots are common.

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Hydrangea - Oakleaf

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Tags: hydrangea, oak leaf, oakleaf, quercifolia