Nikki
Certified GKH Gardening Expert
Certified GKH Gardening Expert
Answered on May 3, 2011
If the temps have dipped down pretty low at night at any time, it could be a bit of frost burn on the petal edges. Also, some of the darker red roses will at times have nearly black edges on their buds. However, if they are a bit crispy, as well as being black, it is either frost or wind burn since the heat is not an issue. It could also be a fungus, but most likely it is not that or the entire bud would have problems.
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