Troubleshooting
Yellow-Twig Dogwood problems — and how to fix them
Yellow-Twig Dogwood (Cornus stolonifera 'Flaviramea') 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
White powdery coating on foliage is common in warm, humid summers with poor air circulation; improve spacing and apply a sulfur-based fungicide if severe.
Loss of stem colour on old wood
Stems older than two to three years lose their yellow pigmentation; cut one-third of the oldest canes to the ground each late winter to maintain vivid new growth.
Borers (Synanthedon spp.)
Clearwing moth larvae tunnel into stems causing sudden wilting and dieback of individual shoots; prune and destroy infested wood promptly and avoid mechanical wounding.
Prevent yellow-twig dogwood problems before they start
Most yellow-twig dogwood issues are care-mismatch, not bad luck. Dial in the basics:
Looking for yellow-twig dogwood in general rather than its problems? Read the full yellow-twig dogwood care guide — light, water, soil and feeding.
Yellow-Twig Dogwood problems — FAQ
Why is my yellow-twig dogwood powdery mildew?
White powdery coating on foliage is common in warm, humid summers with poor air circulation; improve spacing and apply a sulfur-based fungicide if severe.
Why is my yellow-twig dogwood loss of stem colour on old wood?
Stems older than two to three years lose their yellow pigmentation; cut one-third of the oldest canes to the ground each late winter to maintain vivid new growth.
Why is my yellow-twig dogwood borers (synanthedon spp.)?
Clearwing moth larvae tunnel into stems causing sudden wilting and dieback of individual shoots; prune and destroy infested wood promptly and avoid mechanical wounding.