Heather
Certified GKH Gardening Expert
Certified GKH Gardening Expert
Answered on May 16, 2011
It sounds like it has powdery mildew. Treat the plant with a fungicide. This article will help:
https://www.gardeningknowhow.com/plant-problems/disease/powdery-mildew-homemade-and-organic-remedies.htm
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