Betula pendula, silver birch, is a fast-growing deciduous tree native to Europe and parts of northern Asia, grown for its distinctive white bark — smooth and pale at first, developing black diamond-shaped fissures with age — and its slender, drooping branchlets that give the crown a graceful, weeping outline even without a true weeping cultivar. Small leaves turn clear yellow in fall, and inconspicuous male and female catkins appear together with the emerging leaves in spring; the tree is wind-pollinated and produces no ornamental flower display.
It establishes quickly in full sun on well-drained soil but is intolerant of hot, humid summers and compacted or poorly drained sites, where it declines within a couple of decades — it is better suited to cooler northern climates than the Mid-Atlantic or Southeast. It self-seeds readily into disturbed ground and has naturalized in parts of the northern US and Canada, so it is best sited where volunteer seedlings can be monitored and removed rather than near wild or natural areas. Bronze birch borer is the most serious pest, favoring stressed trees, so consistent moisture during establishment and avoiding root disturbance or soil compaction near the trunk are the best long-term defenses.
Fungal leaf spot
Brown or purplish spots on the leaves, often ringed with a yellow halo, that spread and merge in warm, humid, or wet weather; heavily spotted leaves yellow and drop early.
Pick off spotted leaves and clear fallen debris to remove overwintering spores. Improve air circulation by thinning, and water at the base so foliage dries quickly. If it persists, apply a copper- or sulfur-based fungicide at the first sign.