Q.Why are rose buds turning brown & dropping off when the plant looks healthy?
Rose plant looked very healthy with shiny leaves when I bought it. In spite of weekly
spraying with 3–in-1 rose spray (insecticide, fungicide, black spot), it has now
got totally brown buds that fall off & no new healthy buds. Leaves are still green.
It has gotten plenty of rain this summer. What’s wrong?
roseman
Answered on July 4, 2019
The amount of spraying could be too much and is having a negative effect upon the overall rosebush. Too much rain can actually cause the buds to get water logged, sort of rot, turn brown and fall off. Here is a link to an article I wrote on roses not blooming that may be helpful to you as well: https://www.gardeningknowhow.com/ornamental/flowers/roses/no-blooms-on-roses.htm
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