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Brown leaves on phlox. #930220

Asked April 30, 2026, 8:05 PM EDT

Is there a homemade recipe for keeping phlox leaves from turning brown?

Hennepin County Minnesota

Expert Response

Hello,

I am curious as to why I haven't received a reply to my question regarding brown leaves on phlox?

Thank you.

MC

On Thu, Apr 30, 2026 at 7:05 PM Ask Extension <<personal data hidden>> wrote:

Dear michael,

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YOUR QUESTION #0200135:

Brown leaves on phlox.

Is there a homemade recipe for keeping phlox leaves from turning brown?

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The Question Asker Replied May 03, 2026, 11:50 AM EDT
I did answer your question when it was first posted but in toggling through questions, I cannot find my response.  So, I will answer again.  No, there is no recipe to prevent brown leaves.  Phlox has a tendency to develop leaf problems, usually powdery mildew. It may be a lack of moisture or too much moisture.  You need to completely clean up all leaves and stems from last year and then start over with a clean slate.  Thinning out your plants may help because it increases air flow.  If you want to try a fungicide, it must be applied before any disease shows up.  It cannot cure the problem.   https://extension.umn.edu/flowers/tall-garden-phlox     
Barbara, Anoka County MG, TCA Replied May 03, 2026, 8:49 PM EDT

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