I can't answer that question Joni, but I know there are label warnings regarding it's use. May damage the buds. I suggest you contact the manufacturer of the product. It is against the law to use chemicals on plants they are not labeled for. A more refined product called horticulture oil or summer oil would be my choice. Bonide manufactures an All Season Oil that would be a good choice. Make sure the tree has been well watered before applying. Best And Happy Yardening, Nancy.