Troubleshooting
Caryopteris incana problems — and how to fix them
Caryopteris incana (Caryopteris incana) 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.
Cold sensitivity
Less hardy than clandonensis hybrids; can be cut down or killed by hard frost. Plant in a sheltered, warm, sunny spot and mulch the crown.
Root rot in wet soil
Winter-wet or heavy clay rots roots. Use sharply drained, gritty soil and avoid low spots that collect water.
Powdery mildew
White film on leaves in humid, crowded conditions. Improve airflow and water at the base.
Leggy growth
Inadequate sun or no spring pruning gives open, sparse plants. Site in full sun and cut back in early spring.
Prevent caryopteris incana problems before they start
Most caryopteris incana issues are care-mismatch, not bad luck. Dial in the basics:
Looking for caryopteris incana in general rather than its problems? Read the full caryopteris incana care guide — light, water, soil and feeding.
Caryopteris incana problems — FAQ
Why is my caryopteris incana cold sensitivity?
Less hardy than clandonensis hybrids; can be cut down or killed by hard frost. Plant in a sheltered, warm, sunny spot and mulch the crown.
Why is my caryopteris incana root rot in wet soil?
Winter-wet or heavy clay rots roots. Use sharply drained, gritty soil and avoid low spots that collect water.
Why is my caryopteris incana powdery mildew?
White film on leaves in humid, crowded conditions. Improve airflow and water at the base.
Why is my caryopteris incana leggy growth?
Inadequate sun or no spring pruning gives open, sparse plants. Site in full sun and cut back in early spring.