Found a statement at U Miss for foliar feeding at 1 oz epsom per 5 gal of water. Personal use from and Old Jerry Baker pub. Mix 1 tbsp of epsom in a gal of water, feed each plant 1 pint. Magnesium is not in any chemical or packaged organic fertilizer that I have used. Execpt Domolitic lime and manures. In my microclim soil feeding appears to work much better and longer than foiliar feeding. Plants stay greener longer. Byron