Not water or soil. Any educated guesses? by Mysterious-Work-9953 begonias 1 Comment AstolfoFGC 1 day ago It looks possibly like powdery mildew. https://hortsense.cahnrs.wsu.edu/fact-sheet/common-diseases-powdery-mildew/
AstolfoFGC 1 day ago It looks possibly like powdery mildew. https://hortsense.cahnrs.wsu.edu/fact-sheet/common-diseases-powdery-mildew/
1 Comment
It looks possibly like powdery mildew.
https://hortsense.cahnrs.wsu.edu/fact-sheet/common-diseases-powdery-mildew/