Approximately 300 species of evergreen trees, similar to oak. Leaves are alternate, long and leathery. Flowers are on spikes near the end of branches that develop into acorn clusters. Cultivated for foliage or specimen.
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Size:Height: 0 ft. to 30 ft.
Width: 0 ft. to 30 ft.
Bloomtime Range: not applicable
USDA Hardiness Zone:8 to 10
AHS Heat Zone:Not defined for this plant
Light Range:Part Sun to Sun
pH Range:Not defined for this plant
Soil Range:Some Sand to Loam
Water Range:Normal to Moist
ProblemsFungi : Powdery Mildew
Powdery Mildew is usually found on plants that do not have enough air circulation or adequate light. Problems are worse where nights are cool and days are warm and humid. The powdery white or gray fungus is usually found on the upper surface of leaves or fruit. Leaves will often turn yellow or brown, curl up, and drop off. New foliage emerges crinkled and distorted. Fruit will be dwarfed and often drops early.
Prevention and Control: Plant resistant varieties and space plants properly so they receive adequate light and air circulation. Always water from below, keeping water off the foliage. This is paramount for roses. Go easy on the nitrogen fertilizer. Apply fungicides according to label directions before problem becomes severe and follow directions exactly, not missing any required treatments. Sanitation is a must - clean up and remove all leaves, flowers, or debris in the fall and destroy.