Troubleshooting
Purple-flowered Sage problems — and how to fix them
Purple-flowered Sage (Salvia purpurea) 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.
Powdery mildew
White powdery patches appear on leaves in warm, dry spells or where air circulation is poor; water at the base, avoid wetting foliage, and ensure adequate spacing of at least 90 cm.
Frost damage
Tender in frost; even light frosts (−2°C/28°F) can damage or kill the above-ground portions. In zones 8 or cooler, grow in containers and bring under glass before the first frost.
Prevent purple-flowered sage problems before they start
Most purple-flowered sage issues are care-mismatch, not bad luck. Dial in the basics:
Purple-flowered Sage problems — FAQ
Why is my purple-flowered sage powdery mildew?
White powdery patches appear on leaves in warm, dry spells or where air circulation is poor; water at the base, avoid wetting foliage, and ensure adequate spacing of at least 90 cm.
Why is my purple-flowered sage frost damage?
Tender in frost; even light frosts (−2°C/28°F) can damage or kill the above-ground portions. In zones 8 or cooler, grow in containers and bring under glass before the first frost.