Question: is epsom salt a good fertilizer for roses?
Answer: Epsom Salt for Roses Rose growers, in particular, are strong advocates for using Epsom salts. They claim it not only makes the foliage greener and lusher, but it also produces more canes and more roses. ... For ongoing rose care, mix 1 tablespoon of Epsom salts per gallon of water and apply as a foliar spray.