Ask a Question forum: A sickly Black-Eyed Susan

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Northern Illinois
Aug 23, 2017 1:03 PM CST
This Black-Eyed Susan is flowering but has black spots on its leaves. The new leaves look fine, and then the black splotches show up. Anyone know the ailment and if there's anything that can be done? I'm in northern Illinois, where these are natives.
Thumb of 2017-08-23/KatherinePSmit/681df8

Name: Sue
Ontario, Canada (Zone 4a)
Daylilies Birds Enjoys or suffers cold winters Native Plants and Wildflowers Butterflies Annuals
Region: Canadian Keeps Horses Dog Lover Plant Identifier Garden Sages
Aug 23, 2017 1:33 PM CST
It's either a fungal or bacterial leaf spot disease. I see something like it here too on 'Goldsturm'. Some info from the Missouri Botanical Garden on Rudbeckia leaf spots and what to do about them:

Northern Illinois
Sep 2, 2017 11:05 AM CST
Thank you for the Missouri post, it helped! K

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