Q: I have several red twig dogwoods that look beautiful each spring. By midsummer, they continue to grow new sprouts and otherwise appear healthy, but many of the leaves get spotty, turn yellow, and fall off. Is this a fungus? Can it be cured?
A: It probably is a fungus, because shrub dogwoods are affected by many fungal diseases. Most of the leaf spot diseases are more cosmetic and not too harmful. Clean up the dead leaves as often as you can, especially in the fall. A fungicide spray may help, but it will have to be used consistently in the spring and maybe all season long.
