Epsom salt – actually magnesium sulfate – not only has health benefits for humans, but it also helps seeds germinate, makes plants grow bushier, produces more flowers, increases chlorophyll production and deters pests, such as slugs and voles. It also provides vital nutrients to supplement your regular fertilizer.
Although magnesium and sulfur occur naturally in soil, they can be depleted by various conditions, including heavy agricultural use. But unlike most commercial fertilizers, which build up in the soil over time, Epsom Salt is not persistent so you can’t overuse it.
Tips for using Epsom Salts in your garden:
- Houseplants: 2 tablespoons per 4 liters of water; feed plants monthly.
- Roses: 1 tablespoon per 30 cm 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 cup of Epsom Salt per 4 liters of water to help roots recover. Add a tablespoon of Epsom Salt to each hole at planting time.
- Shrubs (evergreens, azaleas, rhododendron): 1 tablespoon per 1 square meter. Apply over root zone every 2-4 weeks.
- Lawns: Apply 1 to 1.5 kilograms for every 100 square meters with a spreader, or dilute in water and apply with a sprayer.
- Trees: Apply 2 tablespoons per 1 square meter. Apply over the root zone 3 times annually.
- Garden Startup: Sprinkle 1 cup per 10 square meters. Mix into soil before planting.