Epsom salt helps improve flower blooming and enhances a plant\'s green color. It can even help plants grow bushier. Epsom salt is made up of hydrated magnesium sulfate (magnesium and sulfur), which is important to healthy plant growth. Good dose of magnesium. If your plants are needing a boost, dissolve about one to two tablespoons of Epsom salt in a gallon of water. Pour at the base of the plant and allow the water-salt solution to soak into the ground. Repeat throughout the season as necessary. Soil Incorporation – Broadcast 1 cup per 100 square foot, mix well into soil before planting. At Planting Time – When planting seedlings or new plants, dig a hole and place about 1 tablespoon of Epsom salt in the bottom of hole and cover with a thin layer of dirt, place the plant in the hole and finish planting. Peppers - Spray your peppers at bloom time.Combine 1 tablespoon of Epsom salt with a gallon of water.Ten days later, repeat the foliar spray again. Tomatoes - Tomatoes can benefit from Epsom salt every 2 weeks.Apply 1 tablespoon diluted in water per foot of plant height per plant.Roses. Soak unplanted bushes in 1/2 cup of Epsom salt per gallon of water to help roots recover. Then add a tablespoon of Epsom salt to each hole at planting time. Lawns, Trees & Shrubs For lawns, use 3 pounds of Epsom salt for every 1,250 square feet. Apply with a spreader or dilute the Epsom salt in water and use a sprayer. For shrubs (evergreens, azaleas, rhododendron), apply 1 tablespoon per 9 square feet over the root zone by diluting in water. Apply every 2 to 4 weeks. Garden Prep your garden by sprinkling 1 cup of Epsom salt over 100 square feet. Mix into the soil before planting.