Troubleshooting
Geneva Bugle problems — and how to fix them
Geneva Bugle (Ajuga genevensis) is generally forgiving once you match its basics, 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 heavy soils
This species has much lower moisture tolerance than Ajuga reptans. Clay or consistently wet soils cause root and crown rot rapidly. Plant strictly in well-drained locations and avoid irrigation in cool, wet periods.
Powdery mildew
Occurs in warm, dry spells with poor air circulation, especially in shaded border positions. Ensure good spacing between plants. Treat with dilute potassium bicarbonate or neem oil spray at first sign of white powdery coating on leaves.
Short lifespan without division
Unlike stoloniferous Ajuga, clumps can become congested and decline after 3–4 years. Divide and replant every 3 years in autumn to refresh vigour and maintain a tidy habit.
Prevent geneva bugle problems before they start
Most geneva bugle issues are care-mismatch, not bad luck. Dial in the basics:
Geneva Bugle problems — FAQ
Why is my geneva bugle root rot in heavy soils?
This species has much lower moisture tolerance than Ajuga reptans. Clay or consistently wet soils cause root and crown rot rapidly. Plant strictly in well-drained locations and avoid irrigation in cool, wet periods.
Why is my geneva bugle powdery mildew?
Occurs in warm, dry spells with poor air circulation, especially in shaded border positions. Ensure good spacing between plants. Treat with dilute potassium bicarbonate or neem oil spray at first sign of white powdery coating on leaves.
Why is my geneva bugle short lifespan without division?
Unlike stoloniferous Ajuga, clumps can become congested and decline after 3–4 years. Divide and replant every 3 years in autumn to refresh vigour and maintain a tidy habit.