Troubleshooting
Mathilde's Rock Jasmine problems — and how to fix them
Mathilde's Rock Jasmine (Androsace mathildae) 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.
Cushion rot (Botrytis / fungal collar rot)
The most serious threat: stagnant moisture at the crown, especially in winter, causes rapid blackening and collapse of rosettes. Ensure overhead dryness and place a grit collar around the cushion base.
Vine weevil
Larvae feed on roots and crowns at soil level, causing sudden wilting. Treat with nematode biological control (Steinernema kraussei) applied in early autumn when soil is still warm.
Prevent mathilde's rock jasmine problems before they start
Most mathilde's rock jasmine issues are care-mismatch, not bad luck. Dial in the basics:
Mathilde's Rock Jasmine problems — FAQ
Why is my mathilde's rock jasmine cushion rot (botrytis / fungal collar rot)?
The most serious threat: stagnant moisture at the crown, especially in winter, causes rapid blackening and collapse of rosettes. Ensure overhead dryness and place a grit collar around the cushion base.
Why is my mathilde's rock jasmine vine weevil?
Larvae feed on roots and crowns at soil level, causing sudden wilting. Treat with nematode biological control (Steinernema kraussei) applied in early autumn when soil is still warm.