I sprayed my fruit trees (in urban yard) with dormant oil but the forecast was uncorrrect and the next day the temp fell to -1. The whole yard was covered with frost; when it melted b 10 am my trees were wet to touch.
i am worried that i have damaged my trees ( 3 of them are two years old) with this premature spraying.
I checked several websites, they all say dormant oil should be applied when there is no danger of frost within 24 hours but before the buds open. However, i could not find the info about what happens if the frost still occurs.
Will the bark be damaged? Or is this recommendation to ensure greater effectiveness of the application?