Troubleshooting
White-blue Sage problems — and how to fix them
White-blue Sage (Salvia albocaerulea) 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.
Root rot in cool, wet conditions
The biggest risk when overwintering under glass; reduce watering drastically from October, ensure pots drain freely, and keep the glasshouse frost-free but well-ventilated.
Whitefly under glass
A common pest on salvias grown as glasshouse or conservatory subjects; introduce Encarsia formosa biological control early in the season, or use yellow sticky traps combined with insecticidal soap spray.
Prevent white-blue sage problems before they start
Most white-blue sage issues are care-mismatch, not bad luck. Dial in the basics:
White-blue Sage problems — FAQ
Why is my white-blue sage root rot in cool, wet conditions?
The biggest risk when overwintering under glass; reduce watering drastically from October, ensure pots drain freely, and keep the glasshouse frost-free but well-ventilated.
Why is my white-blue sage whitefly under glass?
A common pest on salvias grown as glasshouse or conservatory subjects; introduce Encarsia formosa biological control early in the season, or use yellow sticky traps combined with insecticidal soap spray.