Geyer willow is a native shrubby willow of western North America, growing along streambanks, wet meadows, and lakeshores from foothills to subalpine elevations. Its yellow catkins open as early as March, well before most other shrubs leaf out, providing one of the earliest pollen and nectar sources for emerging native bees.
It forms multi-stemmed clumps that spread by suckering and by stems that root on contact with moist soil. Root systems establish quickly and bind streambank soil effectively, making it a standard species in riparian restoration and erosion-control projects. Flexible stems have a long history in traditional basketry. The shrub tolerates periodic flooding and grows across a soil pH range of roughly 5.5–7.5.
Like other Salix species, the bark contains salicin, a compound used by indigenous peoples of western North America to reduce fever and relieve pain. Salicin is the natural precursor to the compound later synthesized as aspirin.
Ecoregions:Northwestern Forested MountainsMarine West Coast ForestNorth American Deserts
These dates are for Zone 6b. Enter your ZIP to time every job to your own frost dates.
- watch · Any time in fallExamine main stems for sunken, discolored bark indicating Cytospora canker. Prune affected wood well below the margin and dispose of cuttings off-site.
- cut · Any time in winterWhile fully dormant, harvest flexible one-year stems for basketry before catkins begin to swell.
- cut · Any time in winterRemove one-third of the oldest, thickest stems to the base every two to three years to keep the clump vigorous and open.
- plant · Mar 13Plant bare-root stock or push 12-inch hardwood cuttings directly into saturated soil at the water's edge; roots establish rapidly without rooting hormone.
- watch · Any time in springInspect emerging leaves for dark, velvety patches on undersides - an early sign of willow scab. Remove and dispose of infected shoots promptly.
- watch · Any time in summerCheck leaf undersides in early summer for orange rust pustules. Rake and remove fallen infected leaves to reduce spore load.
Problems & troubleshooting
Common problems
Willow Scab
Olive-brown to black lesions appear on young leaves within days of bud break, causing rapid curling and leaf drop. Shoot tips blacken and die back. Dark, sunken lesions develop on current-season stems, and salmon-colored spore masses may be visible on infected tissue during humid weather.
Rake and destroy all fallen leaves and infected shoot tips each autumn. Apply a copper-based fungicide or myclobutanil at bud swell, then again at bud break. In persistently wet springs, repeat every 10–14 days until new shoot growth hardens off. Improve canopy airflow through selective pruning and avoid overhead irrigation.
Rust
Orange to brown raised pustules on the undersides of leaves, with yellow spotting on the upper surface. Heavy infections cause leaves to yellow and drop.
Remove and destroy infected leaves. Avoid overhead watering and improve air circulation. Apply a sulfur or copper-based fungicide if it spreads. Clear plant debris in fall.
Cytospora Canker
White or blue-white pitch masses ooze from bark on lower branches and the trunk. Affected branches die back progressively from the tip inward; bark beneath the resin is discolored brown and may have a resinous, sunken appearance.
Prune infected branches well below the canker margin into healthy wood and destroy all cuttings. Sterilize pruning tools with 70% isopropyl alcohol between each cut. No effective fungicide is available; prevent recurrence by avoiding drought stress, soil compaction, and mechanical bark injury.
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.
Botryosphaeria Canker
Dark, sunken cankers on stems and major branches, most often occurring after drought stress or mechanical wounding. Bark peeled back from affected areas reveals brown, discolored wood beneath. Branch tips wilt and die back progressively inward.
Prune infected branches at least 6 inches below the visible canker margin using sterilized tools, and dispose of all cuttings away from the garden. Reduce plant stress by maintaining consistent irrigation during dry periods and avoiding bark wounds during maintenance. No curative fungicide is available; keeping plants vigorous is the primary preventive strategy.