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Black Eyed Susans

Q.Black-Eyed Susan Concern

Anonymous added on March 20, 2011 | Answered

At the end of the┬áseason last summer here in St. Paul, Minnesota, I noticed a large quantity of black powder at the base of my 4 ft x 3 ft patch of blacked-eyed Susan plants. It looked as though black ‘coal dust’ had been laced throughout the patch, from the ground and up about 8 inches. Any ideas what would cause this and how would I keep it from happening again? They are planted in the middle of a 20 x 10 foot garden, receive a lot of sun, are planted in black dirt, and the garden has cedar chips sprinkled on top of the dirt.

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Certified GKH Gardening Expert
Answered on March 20, 2011

That is called sooty mold. This article will help you in case it comes back:

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