How to Make Your Own Fertilizer The Spruce
1. Dissolve the Epsom salt in water. 2. Use the solution to water your plants. 3. Repeat once a month to maintain efficacy. Why This Works . Epsom salt is made up of magnesium and sulfate – both vital plant nutrients. Some magnesiumloving plants to try it on: houseplants, roses, peppers, tomatoes, and potatoes.