GKH_Susan
Certified GKH Gardening Expert
Certified GKH Gardening Expert
Answered on August 31, 2024
I'm wondering if your roses were visited by thrips while in bud. Another possibility is botrytis blight. Here is more:
https://www.gardeningknowhow.com/ornamental/flowers/roses/rose-thrips.htm
https://www.gardeningknowhow.com/ornamental/flowers/roses/botrytis-blight-roses.htm
https://www.public.asu.edu/~camartin/plants/Plant%20html%20files/Rose%20Problems.pdf
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