Bee Balm Plants

Powdery Mildew and Bee Balm

Anonymous added on July 4, 2015 | Answered

I have bee balm plants that have powdery mildew. 3 questions: is it caused by wet or dry conditions? Is a spray of water and milk really an effective preventative? Once it is on the plant, how can I get rid of it (i.e. commercial spray or other recommendation)?

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Certified GKH Gardening Expert
Answered on July 5, 2015

Powdery mildew loves moist conditions, though even plants that are somewhat dry can be affected. A weekly spray of milk at a concentration of 1 part milk to 9 parts water may significantly reduce the severity of powdery mildew infections. Neem oil is also effective in treating powdery mildew. For more information, these articles will help:

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