Wet leaves, especially overnight, can encourage fungal diseases, so it's crucial to apply water directly to the soil. Rhododendrons benefit from a balanced fertilizer applied at the right times.

Pacific rhododendrons are vulnerable to fungal leaf spots, powdery mildew, galls, root rot, and chlorosis. Providing adequate ...

Morphology of ascomata of Rhytismataceae on twigs of Rhododendron spp ... basis for the prevention and control of major forest tree diseases caused by Rhytismatales species and for the breeding ...