Black Eyed Susans
Q.

Black Spots on Rudbeckia

usafsr71 added on June 1, 2011 | Answered

How can I get rid of the black spots on the leaves of my black-eyed Susans? The spots grow until the whole leaf turns black. How do I keep it from spreading? Is there a way to get rid of them, and how do I prevent them in the future?

A.
A.Answers to this queston: Add Answer
Heather
Certified GKH Gardening Expert
Answered on June 4, 2011

This sounds like black spot fungus. You can treat the plants with a fungicide and it should take care of the fungus. If you are manually watering them, try to water them from below rather than from above. The fungus is made worse by water sitting on the leaves.

00
Was this answer useful?

Log in or sign up to help answer this question.
Did you find this helpful? Share it with your friends!

You must be logged into your account to answer a question.

If you don't have an account sign up for an account now.

Looking for more?
here are more questions about...
Black Eyed Susans
Join Us - Sign up to get all the latest gardening tips!

Do you know a lot about gardening?
Become a GKH Gardening Expert

Learn More