Diagnosing White Fuzzy Growth on Crepe Myrtle

Diagnosing White Fuzzy Growth on Crepe Myrtle

After periods of heavy rain, crepe myrtles often develop a white, powdery or fuzzy coating on new shoots. This is typically powdery mildew, a fungal disease favored by humid, wet conditions, though it can sometimes be confused with insect secretions like those from aphids or scale.

Organic Treatment Option

An organic product such as Atomic Grow can help suppress powdery mildew and improve overall plant health, making the tree more resistant to both fungal and insect issues. Apply as a foliar spray according to label directions, covering all foliage thoroughly.

Cultural Practices

Improve air circulation by selective pruning, avoid overhead watering, and clean up fallen leaves in autumn to reduce overwintering inoculum. Monitor nearby plants, as the disease can spread to other susceptible species.