Troubleshooting
Thyme-leaved Sandwort problems — and how to fix them
Thyme-leaved Sandwort (Arenaria serpyllifolia) 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.
Root rot and damping-off in wet conditions
The most common cause of failure in cultivation; ensure the growing medium is gritty and free-draining, and avoid overhead watering or poorly ventilated, humid conditions.
Displacement by vigorous neighbours
As a small, delicate plant it is readily outcompeted in fertile soils; grow in dedicated gravel beds, wall crevices, or paving joints where larger plants cannot crowd it out.
Prevent thyme-leaved sandwort problems before they start
Most thyme-leaved sandwort issues are care-mismatch, not bad luck. Dial in the basics:
Thyme-leaved Sandwort problems — FAQ
Why is my thyme-leaved sandwort root rot and damping-off in wet conditions?
The most common cause of failure in cultivation; ensure the growing medium is gritty and free-draining, and avoid overhead watering or poorly ventilated, humid conditions.
Why is my thyme-leaved sandwort displacement by vigorous neighbours?
As a small, delicate plant it is readily outcompeted in fertile soils; grow in dedicated gravel beds, wall crevices, or paving joints where larger plants cannot crowd it out.