If you are in a colder climate area, the colder nights could cause this. If not, the rosebushes may need more water to help get them going well. There could also be a fungus at work on them, spraying the rosebushes with a goof fungicide could be in order. Check out this article link on leaves falling off the roses: https://www.gardeningknowhow.com/ornamental/flowers/roses/leaves-falling-off-roses.htm
Answered on March 25, 2016
Was this answer useful?00
Looking for more?
here are more questions about...Hyacinth Plant