Troubleshooting
Purple Garden Sage problems — and how to fix them
Purple Garden Sage (Salvia officinalis 'Purpurascens') 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.
Rosemary beetle
The metallic green-and-purple striped rosemary beetle (Chrysolina americana) feeds on foliage and stems; pick off adults and larvae by hand in spring and autumn.
Root and crown rot
Caused by overly wet or waterlogged soil, particularly in winter; improve drainage by planting on a slight slope or incorporating grit, and avoid mulching directly against the crown.
Prevent purple garden sage problems before they start
Most purple garden sage issues are care-mismatch, not bad luck. Dial in the basics:
Purple Garden Sage problems — FAQ
Why is my purple garden sage rosemary beetle?
The metallic green-and-purple striped rosemary beetle (Chrysolina americana) feeds on foliage and stems; pick off adults and larvae by hand in spring and autumn.
Why is my purple garden sage root and crown rot?
Caused by overly wet or waterlogged soil, particularly in winter; improve drainage by planting on a slight slope or incorporating grit, and avoid mulching directly against the crown.