Troubleshooting
Sea Mouse-ear problems — and how to fix them
Sea Mouse-ear (Cerastium diffusum) is generally low-drama, but a few issues come up again and again. Here is what each one looks like, why it happens, and the fix.
Damping-off
In moist, cool conditions seedlings collapse at soil level due to Pythium or Fusarium fungi; sow in sharply drained grit-based compost and avoid overhead watering.
Root rot in wet winters
Although cold-hardy, prolonged waterlogging in clay soils during winter kills the shallow root system; grow in raised beds or rock-garden scree where drainage is rapid.
Prevent sea mouse-ear problems before they start
Most sea mouse-ear issues are care-mismatch, not bad luck. Dial in the basics:
Sea Mouse-ear problems — FAQ
Why is my sea mouse-ear damping-off?
In moist, cool conditions seedlings collapse at soil level due to Pythium or Fusarium fungi; sow in sharply drained grit-based compost and avoid overhead watering.
Why is my sea mouse-ear root rot in wet winters?
Although cold-hardy, prolonged waterlogging in clay soils during winter kills the shallow root system; grow in raised beds or rock-garden scree where drainage is rapid.