What Is Excel or Copper Sulfate?
I have brown spots on my hawthornes and was told to use Excel, which I can't find. Then told that copper sulfate was the same. Can't find that either. . . . Please help.
Certified GKH Gardening Expert
These are both fungicides. They can be used, but there are several other fungicides that will work as well. I am assuming that this is for a fruit tree? You can go to your local garden center and ask for a fruit tree spray or a fungicide. It should be labeled fungicide on the bottle. All garden centers (should) carry at least one type of fungicide.
Silly me, you said it was for a hawthorne. Sorry. Regardless, you can still use a fruit tree spray on the plant as long as it is marked as containing a fungicide. Fruit trees have many fungi that can attack them and so there are several products that are sold to help gardeners treat fungus on fruit trees. But these products are just as effective on non fruit trees and plants.