Some outdoor garden plants are particularly susceptible to fungal problems like black spot and powdery mildew. This is usually true when temperatures are hot with high humidity.
Powdery mildew looks like someone has sprinkled the leaves with flour.
It's important that a plant is well hydrated before applying this solution. Water deeply a couple of days before spraying. This formula is often used on roses. All material on this web site is copyrighted. Printing for personal use only.