Troubleshooting
common dogwood problems — and how to fix them
common dogwood (Cornus sanguinea) 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.
Powdery mildew on foliage
White powdery coating may appear on leaves in dry summers, particularly in dense plantings with restricted airflow. Improve spacing and air circulation; apply potassium bicarbonate spray if severe. Hard pruning each cycle removes infected material.
Suckering beyond intended bounds
Spreads readily by root suckers and self-seeds in favorable conditions. Excellent for naturalistic planting but can overwhelm adjacent plants in a formal border. Remove suckers at the root and deadhead to reduce seeding.
Dull winter stems without hard pruning
Like other red-stemmed dogwoods, stem color fades with age. Old wood turns dull brown. Hard coppicing every 2–3 years in late winter to early spring renews the clump with vibrant young stems for the following winter.
Prevent common dogwood problems before they start
Most common dogwood issues are care-mismatch, not bad luck. Dial in the basics:
Looking for common dogwood in general rather than its problems? Read the full common dogwood care guide — light, water, soil and feeding.
common dogwood problems — FAQ
Why is my common dogwood powdery mildew on foliage?
White powdery coating may appear on leaves in dry summers, particularly in dense plantings with restricted airflow. Improve spacing and air circulation; apply potassium bicarbonate spray if severe. Hard pruning each cycle removes infected material.
Why is my common dogwood suckering beyond intended bounds?
Spreads readily by root suckers and self-seeds in favorable conditions. Excellent for naturalistic planting but can overwhelm adjacent plants in a formal border. Remove suckers at the root and deadhead to reduce seeding.
Why is my common dogwood dull winter stems without hard pruning?
Like other red-stemmed dogwoods, stem color fades with age. Old wood turns dull brown. Hard coppicing every 2–3 years in late winter to early spring renews the clump with vibrant young stems for the following winter.