Troubleshooting
Bugle problems — and how to fix them
Bugle (Ajuga reptans) 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.
Crown rot
The most serious problem: caused by the fungal pathogen Sclerotium rolfsii in warm, wet conditions. Centres of colonies collapse and turn brown. Improve drainage, thin congested patches, and avoid overhead watering. Remove and dispose of affected plants immediately.
Powdery mildew
Can affect foliage in areas with poor air circulation or during humid summers. Thin overly dense colonies every 2–3 years and position plants where air moves freely around the leaves.
Prevent bugle problems before they start
Most bugle issues are care-mismatch, not bad luck. Dial in the basics:
Bugle problems — FAQ
Why is my bugle crown rot?
The most serious problem: caused by the fungal pathogen Sclerotium rolfsii in warm, wet conditions. Centres of colonies collapse and turn brown. Improve drainage, thin congested patches, and avoid overhead watering. Remove and dispose of affected plants immediately.
Why is my bugle powdery mildew?
Can affect foliage in areas with poor air circulation or during humid summers. Thin overly dense colonies every 2–3 years and position plants where air moves freely around the leaves.