Troubleshooting
Lilac Sage problems — and how to fix them
Lilac Sage (Salvia verticillata) 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
Appears as a white powdery coating on foliage in warm, humid or overcrowded conditions; improve spacing for better airflow, water at the base rather than overhead, and remove badly affected leaves.
Excessive self-seeding
Plants can self-seed prolifically and become weedy if spent flower spikes are not removed before seeds ripen; deadheading also encourages a second flush of bloom.
Prevent lilac sage problems before they start
Most lilac sage issues are care-mismatch, not bad luck. Dial in the basics:
Lilac Sage problems — FAQ
Why is my lilac sage powdery mildew?
Appears as a white powdery coating on foliage in warm, humid or overcrowded conditions; improve spacing for better airflow, water at the base rather than overhead, and remove badly affected leaves.
Why is my lilac sage excessive self-seeding?
Plants can self-seed prolifically and become weedy if spent flower spikes are not removed before seeds ripen; deadheading also encourages a second flush of bloom.