Troubleshooting
Alpine bearberry problems — and how to fix them
Alpine bearberry (Arctostaphylos alpina) is generally forgiving once you match its basics, but a few issues come up again and again. Here is what each one looks like, why it happens, and the fix.
Heat stress and summer scorch at low elevations
This arctic species is poorly adapted to warm, humid summers below 400 m. Provide afternoon shade in warm gardens, cool the root zone with a deep gravel mulch, and site on a cool north- or east-facing slope where possible.
Poor establishment in alkaline soils
Lime intolerance causes chlorosis and stunted growth. Test soil pH before planting; it must be below 5.5. Use ericaceous compost at planting and apply acidifying mulch annually. Never use tap water with high pH in limestone areas.
Frost heave damage to shallow roots
The shallow root system can be displaced by repeated freeze-thaw cycles in areas without reliable snow cover. Apply a layer of coarse grit or gravel mulch over the root zone in autumn to moderate soil temperature fluctuations.
Prevent alpine bearberry problems before they start
Most alpine bearberry issues are care-mismatch, not bad luck. Dial in the basics:
Alpine bearberry problems — FAQ
Why is my alpine bearberry heat stress and summer scorch at low elevations?
This arctic species is poorly adapted to warm, humid summers below 400 m. Provide afternoon shade in warm gardens, cool the root zone with a deep gravel mulch, and site on a cool north- or east-facing slope where possible.
Why is my alpine bearberry poor establishment in alkaline soils?
Lime intolerance causes chlorosis and stunted growth. Test soil pH before planting; it must be below 5.5. Use ericaceous compost at planting and apply acidifying mulch annually. Never use tap water with high pH in limestone areas.
Why is my alpine bearberry frost heave damage to shallow roots?
The shallow root system can be displaced by repeated freeze-thaw cycles in areas without reliable snow cover. Apply a layer of coarse grit or gravel mulch over the root zone in autumn to moderate soil temperature fluctuations.