I sprayed my roses for green fly the weekend it was very hot. Since then most of the leaves have fallen off and look quite dead. I have 20 bushes and all the same Do you think they will regrow?
The leaves should return okay. Always remember a couple things. Never ever spray during the heat of the day, early morning and mid evening when temps are lower is best. Also, always water the roses well the day before you spray or apply any pesticide. A well hydrated rose is far less likely to have a bad reaction than a thirsty one.