Magnesium and sulfur are the two major components of Epsom Salt. Crop researchers have determined that magnesium is:
A critical mineral for seed germination.
Vital to the production of chlorophyll, which plants use to transform sunlight into food.
An aid in the absorption of phosphorus and nitrogen, two of the most important fertilizer components.
Sulfur, the other major component of Epsom Salt, is also an important plant nutrient. Sulfer may:
Contribute to chlorophyll production.
Make the primary nutrients (nitrogen, phosphorus and potassium) found in most fertilizers more effective.
Although magnesium and sulfur occur naturally in soil, they can be depleted by various conditions, including heavy agricultural use over time. But unlike most commercial fertilizers, which build up in the soil over time, Epsom Salt is not persistent so you can’t overuse it. Tests by the National Gardening Association confirm – roses fertilized with Epsom Salt grow bushier and produce more flowers, while the compound makes pepper plants grow larger than those treated with commercial fertilizer alone.
Hints & Tips:
Houseplants: 2 tablespoons per gallon of water; feed plants monthly.
Tomatoes: 1 tablespoon per foot of plant height per plant; apply every two weeks.
Roses: 1 tablespoon per foot of plant height per plant; apply every two weeks. Also scratch 1/2 cup into soil at base to encourage flowering canes and healthy new basal cane growth. Soak unplanted bushes in 1/2 cup of Epsom Salt per gallon of water to help roots recover. Add a tablespoon of Epsom Salt to each hole at planting time. Spray with Epsom Salt solution weekly to discourage pests.
Shrubs (evergreens, azaleas, rhododendron): 1 tablespoon per 9 square feet. Apply over root zone every 2-4 weeks.
Lawns: Apply 3 pounds for every 1,250 square feet with a spreader, or dilute in water and apply with a sprayer.
Trees: Apply 2 tablespoons per 9 square feet. Apply over the root zone 3 times annually.
Garden Startup: Sprinkle 1 cup per 100 square feet. Mix into soil before planting.
Sage: Do not apply! This herb is one of the few plants that doesn’t like Epsom Salt.