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Diseased coneflowers #878217

Asked July 22, 2024, 10:32 AM EDT

I believe some of my coneflowers may have aster yellows. Should I deadhead, cut back or dig up. Any advice is greatly appreciated.

Queen Anne's County Maryland

Expert Response

Unfortunately, you are correct. The plants in your photos definitely have Aster Yellows disease and need to be dug out and removed, taking some soil margins with them. Bag them up and put them in the trash.
Here is our page on Aster Yellows: 
https://extension.umd.edu/resource/aster-yellows-disease-flowers/


Christine
Answered by theHome and Garden Information Center (HGIC), University of Maryland Extension. For timely gardening information and tips, subscribe to our Maryland Grows blog and quarterly newsletter. Follow us on Facebook, Instagram, and YouTube. Replied July 22, 2024, 1:12 PM EDT

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