Why does my rose bush leaves have black spots ?
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It is a fungal disease. Here's a link with more information:
https://www.gardeningknowhow.com/ornamental/flowers/roses/black-spot-roses.htm
Hello heres a link with explanation and management hope that this helps
https://web.extension.illinois.edu/focus/index.cfm?problem=black-spot
Your roses have caught a fungus, here is what you can do:
https://www.thespruce.com/black-spot-on-roses-4125530
here is info for you Ronnie
https://www.gardendesign.com/how-to/black-spot.html
Hi Ronnie, this should help you get your roses fixed up,
https://www.gardendesign.com/how-to/black-spot.html#:~:text=A%20Cornell%20University%20researcher%20demonstrated,the%20spread%20of%20black%20spot.
Purchase a spray made specifically for roses at Home Depot
https://www.gardeningknowhow.com/ornamental/flowers/roses/black-spot-roses.htm
It is most likely a fungus. I had a few issues with all the rain we experienced this summer. You can dust with a fungicide to help clear it up.
Here is how to treat the black spots: https://www.youtube.com/watch?v=GNAm_O5JxA8
Black spots on roses are a type of fungus - here is a link that gives you some ideas on natural ways to get rid of this
https://www.gardeningknowhow.com/ornamental/flowers/roses/black-spot-roses.htm