Great to boost flower production in roses, tomatoes, peppers, and more! A magnesium source that is essential to plant development, production of chlorophyll and stimulating bloom and growth. Use on roses, flowering ornamentals and shrubs. Helps plants absorb phosphorus as well as increase a plant’s natural resistance to disease. Can be absorbed by both leaves and roots. OMRI listed. Apply 1/4 cup to base of the plant early in the spring when new growth begins. Foliar – apply 1/4 cup (4 tablespoons) per 1-2 gallons of water to cover 1000 square ft. Apply 2-4 applications throughout the growing season. Ship weight 4 lb. Ingredients are 9.8% magnesium, and 12.9% sulfur. 4 pound. bag. Apply 2 to 4 times in the season.