Troubleshooting
Mountain Sandwort problems — and how to fix them
Mountain Sandwort (Arenaria montana) 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.
Crown rot in wet conditions
Excess soil moisture, especially in winter, causes the central crown to rot and the plant to die suddenly. Ensure razor-sharp drainage and shelter from prolonged wet weather; raise beds if necessary.
Leggy, sparse flowering
Insufficient sun leads to stretched stems and few flowers. Shear lightly after flowering to keep the mat compact and encourage a second flush of bloom.
Aphid clusters on new growth
Soft spring shoots attract aphids. Blast off with water or apply insecticidal soap. Avoid high-nitrogen feeding, which produces the succulent growth aphids prefer.
Prevent mountain sandwort problems before they start
Most mountain sandwort issues are care-mismatch, not bad luck. Dial in the basics:
Mountain Sandwort problems — FAQ
Why is my mountain sandwort crown rot in wet conditions?
Excess soil moisture, especially in winter, causes the central crown to rot and the plant to die suddenly. Ensure razor-sharp drainage and shelter from prolonged wet weather; raise beds if necessary.
Why is my mountain sandwort leggy, sparse flowering?
Insufficient sun leads to stretched stems and few flowers. Shear lightly after flowering to keep the mat compact and encourage a second flush of bloom.
Why is my mountain sandwort aphid clusters on new growth?
Soft spring shoots attract aphids. Blast off with water or apply insecticidal soap. Avoid high-nitrogen feeding, which produces the succulent growth aphids prefer.