Q.black eyed susans
Why did my black eyed susan bloom this year with white flowers
Downtoearthdigs
Answered on July 17, 2017
We have not heard of this or have any research that would explain this.
Black Eyed Susan's can be effected by Powdery Mildew, which would cause a white powdery film on the leaves.
You can send us an image if you like.
https://www.gardeningknowhow.com/plant-problems/disease/powdery-mildew-homemade-and-organic-remedies.htm
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