Troubleshooting
Four-angled cassiope problems — and how to fix them
Four-angled cassiope (Cassiope tetragona) 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.
Root rot in warm/wet summers
Cassiope tetragona is extremely sensitive to summer heat and waterlogging. In warm climates, ensure perfect drainage and position in a cool north- or east-facing aspect. Alpine house culture is often necessary in warmer temperate zones.
Failure to flower
Often caused by insufficient winter cold or inadequate cool dormancy. This species needs genuine cold winters (below freezing) to initiate flowering. In mild climates, bloom may be sparse or absent.
Alkaline soil intolerance
Yellowing of foliage (interveinal chlorosis) indicates soil pH is too high. Test soil pH and correct with sulfur or ericaceous compost. Never use tap water high in calcium if it raises soil pH.
Prevent four-angled cassiope problems before they start
Most four-angled cassiope issues are care-mismatch, not bad luck. Dial in the basics:
Four-angled cassiope problems — FAQ
Why is my four-angled cassiope root rot in warm/wet summers?
Cassiope tetragona is extremely sensitive to summer heat and waterlogging. In warm climates, ensure perfect drainage and position in a cool north- or east-facing aspect. Alpine house culture is often necessary in warmer temperate zones.
Why is my four-angled cassiope failure to flower?
Often caused by insufficient winter cold or inadequate cool dormancy. This species needs genuine cold winters (below freezing) to initiate flowering. In mild climates, bloom may be sparse or absent.
Why is my four-angled cassiope alkaline soil intolerance?
Yellowing of foliage (interveinal chlorosis) indicates soil pH is too high. Test soil pH and correct with sulfur or ericaceous compost. Never use tap water high in calcium if it raises soil pH.