How to Treat Curly Leaf on Peach Trees

Add two tablespoons of Epsom salt to a gallon of water, and use tank sprayer to apply the mix once a month, substituting the spray for a regular watering. Use one tablespoon per gallon of water if you apply Epsom salt spray more often than once a month.

You should only use about a tablespoon.

I would check at your local pharmacy or medical supply location for plain old Epsom salt. The scent probably won't hurt the tree, but better to be safe. Also, the plain kind should be less expensive.

Baking soda is a buffer that brings acidic conditions closer to neutral and brings basic conditions closer to neutral as well. However, the proper name is sodium bicarbonate, so if used like fertilizer and sprinkled around the base of a tree, it will act like a salt and prevent water uptake, stressing and eventually killing the tree. If you want the greatest benefit from baking soda's buffering action, spray in on the leaves (especially the undersides). Even a slight change in pH can be enough to prevent fungus from penetrating the cuticle of leaves and infesting the plant. Be sure to repeat after any rain event that may wash the soda off the plant.