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Avatar for dianebarrera
May 27, 2020 10:18 AM CST
Katy, Texas
I have 6 beautiful hardy hibiscus in my yard. They were planted 3 years ago. Last year, I believe we were watering them too much and as a result developed a white powder over stems and leaves. I started last year spraying with need oil but the white powder has come back and they have a stunted growth now. I would appreciate any advice. Thanks!
Avatar for luis_pr
May 27, 2020 12:29 PM CST
Name: Luis
Hurst, TX, U.S.A. (Zone 8a)
Azaleas Salvias Roses Plumerias Region: New Hampshire Hydrangeas
Hibiscus Region: Georgia Region: Florida Dog Lover Region: Texas
Sounds like powdery mildew, sometimes caused by overhead watering and very common in hibiscuses. Try watering the soil only. There are many fungicide sprays sold for this and you can make a solution yourself using milk and water in various concentrations like 40% milk to 60% water. Dispose of the solution that you do not use after spraying.

https://www.growveg.com/guides...
Last edited by luis_pr May 27, 2020 11:32 PM Icon for preview
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