Epsom salt for plants is a beneficial supplement for improving flower color and encouraging healthier blooms. This easy-to-use natural option contains magnesium and sulfur, essential nutrients ...

Epsom salt can help plants thrive, but only if they're deficient in magnesium. The best way to determine this is by testing the soil in your garden with a university extension lab for a small fee.

While Epsom salt can benefit many plants, some don't respond well. Plants that thrive in acidic soil—like azaleas, rhododendrons, and blueberries—may suffer from Epsom salt's magnesium content.