why do treatments for blackspot on my roses not work?

godschild added on July 28, 2012 | Answered

Why do treatments for blackspot on my roses not work?

A.Answers to this queston: Add Answer
Certified GKH Gardening Expert
Answered on July 29, 2012

Even when the black spot fungus has been killed, it leaves its mark upon the foliage of the roses. The new foliage should be free from the black spots though if the fungus was killed by the spray being used. If I have big problems with black spot, I use a product called Mancozeb available from , it is the only thing I have found that will stop black spot in its tracks. It does leave a yellowish powdery residue on the foliage. That is part of how it works. Once it is under control I keep my rosebushes sprayed with Green Cure fungicide every two to three weeks depending on how damp it has been. Here is an article for you too at this link:

Was this answer useful?

Answered on July 29, 2012

use 1 tbs epson salt to 1 gal water and use a hand sprayer and spray ur roses once a wk.....or when spots show up.bk spot usually shows up when to much moisture is on foilage.

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...
Join Us - Sign up to get all the latest gardening tips!

Learn From
Your Peers on
Our Blog

Visit Our Blog

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

Learn More