Troubleshooting
Red-Topped Sage problems — and how to fix them
Red-Topped Sage (Salvia viridis) 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.
Aphids
Colonies of aphids often colonise the soft new growth and coloured bracts; remove by hand or treat with insecticidal soap, being careful not to disfigure the ornamental bracts.
Botrytis (grey mould)
Wet summers or overhead watering can trigger grey mould on the bracts and stems; improve air circulation, water at the base, and remove affected material promptly.
Prevent red-topped sage problems before they start
Most red-topped sage issues are care-mismatch, not bad luck. Dial in the basics:
Red-Topped Sage problems — FAQ
Why is my red-topped sage aphids?
Colonies of aphids often colonise the soft new growth and coloured bracts; remove by hand or treat with insecticidal soap, being careful not to disfigure the ornamental bracts.
Why is my red-topped sage botrytis (grey mould)?
Wet summers or overhead watering can trigger grey mould on the bracts and stems; improve air circulation, water at the base, and remove affected material promptly.