black spot/rust on roses?
Thanks for writing. It sounds like rust, a relatively common disease of roses.
The disease overwinters on dead leaves --- so be sure to rake away of last year's leaves from around your plant before your rose leafs out this year. Because cool, moist weather favors the growth of rust disease, you may also want to spray your roses with a fungicide (either commercial or organic) through the spring to help prevent the rust from taking hold.
Good luck. I hope this helps!
---Justin, Senior Garden Editor, BHG.com
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