Troubleshooting
Rock Jasmine problems — and how to fix them
Rock Jasmine (Androsace sarmentosa) 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 winter wet
The hairy rosettes trap moisture in cold, wet winters, leading to fungal rot. Apply a dry gravel mulch under the foliage, ensure sharp drainage, and consider overhead protection with a pane of glass in persistently wet climates.
Spider mites in hot, dry spells
Fine webbing and stippled, bronzed foliage signal spider mite attack during hot, dry summers. Improve air circulation, mist the undersides of foliage with water, and treat with a miticide or insecticidal soap if infestation is heavy.
Stolons becoming invasive
Vigorous runners can swamp smaller alpines in a trough or raised bed. Trim back stolons annually in late summer to keep the plant within bounds and to encourage regeneration of fresh, floriferous rosettes.
Prevent rock jasmine problems before they start
Most rock jasmine issues are care-mismatch, not bad luck. Dial in the basics:
Rock Jasmine problems — FAQ
Why is my rock jasmine crown rot in winter wet?
The hairy rosettes trap moisture in cold, wet winters, leading to fungal rot. Apply a dry gravel mulch under the foliage, ensure sharp drainage, and consider overhead protection with a pane of glass in persistently wet climates.
Why is my rock jasmine spider mites in hot, dry spells?
Fine webbing and stippled, bronzed foliage signal spider mite attack during hot, dry summers. Improve air circulation, mist the undersides of foliage with water, and treat with a miticide or insecticidal soap if infestation is heavy.
Why is my rock jasmine stolons becoming invasive?
Vigorous runners can swamp smaller alpines in a trough or raised bed. Trim back stolons annually in late summer to keep the plant within bounds and to encourage regeneration of fresh, floriferous rosettes.