Q.What Could Cause Severe Wilting, Yellowing, And Small Brown Spots On The Leaves Of My Phlox?
I have two phlox plants that are roughly 4-5 ft apart. One looks amazing and the other is struggling, but I’m not sure why. Pictures are attached.

BushDoctor
Certified GKH Gardening Expert
Certified GKH Gardening Expert
Answered on July 2, 2020
This would be Verticillium Wilt! This is unfortunate. Here is an article that will explain in detail:
https://www.gardeningknowhow.com/plant-problems/disease/verticillium-wilt-treatment.htm
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