Knockout Rose Bushes
Q.

Knockout Roses Have Leaves with Areas That Look Discolored

Zone central TX | blackthumbTX added on August 25, 2012 | Answered

These areas are not on the leaf but in it.

A.
A.Answers to this queston: Add Answer
roseman
Answered on August 26, 2012

I am not sure what you mean by discolored. However, it could be that the leaves are just turning towards yellow as they are soon to fall off. It could also be a fungus that is working on them. Here are a couple links to articles that you may find useful:

https://www.gardeningknowhow.com/ornamental/flowers/roses/black-spot-roses.htm

https://www.gardeningknowhow.com/ornamental/flowers/roses/rose-bush-diseases.htm

https://www.gardeningknowhow.com/ornamental/flowers/roses/yellow-rose-leaves.htm

https://www.gardeningknowhow.com/ornamental/flowers/roses/leaves-falling-off-roses.htm

These articles will give you some great information.

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