Powdery mildew How to Grow Plumeria > Disease > Powdery mildew Posted on November 8, 2022November 9, 2022 by Tex Norwood Tags: Disease, Plumeria CareFine, white to gray, powdery fungal coating on leaves, stems, and flowers. Related Articles: Plumeria Seeds and Seed QualityPowdery Mildew Chemical ControlsGlossary: Calcium CarbonatePlumeria RustMildewVisit our InfoTIP Glossary