Epson Salts - Magnesium Sulphate for Plants - Food Grade

Epsom Salts are a naturally occurring mineral compound made up of magnesium and sulphate, first identified back in 1618 in a natural saline spring near Epsom, in Surrey, England. Since then, they've become a trusted, multi-purpose mineral used across gardening, agriculture, health and household applications. Our Epsom Salts are food grade, giving you the assurance of a pure, high-quality product suitable for a wide range of uses around the home and garden.

Magnesium and sulphur are two of the most essential minerals for healthy plant growth, and soils can easily become depleted of them over time — particularly in heavily cropped or sandy soils. Epsom Salts offer a simple, fast-acting way to replenish these nutrients and support stronger, greener, more productive plants.

Why Magnesium and Sulphate Matter for Plants

• Magnesium sits at the centre of the chlorophyll molecule, meaning it's directly responsible for photosynthesis and the deep green colour of healthy foliage. A magnesium deficiency often shows up as yellowing between leaf veins, stunted growth, or reduced flowering and fruiting.
• Sulphate supports the plant's ability to produce proteins, enzymes and essential amino acids, contributing to stronger root development, improved nutrient uptake and better overall plant vigour.

Because Epsom Salts are highly water-soluble, magnesium and sulphate are made readily available to plant roots almost immediately after application — making it one of the quickest ways to correct a deficiency compared to slower-release soil amendments.

Garden & Soil Conditioning Uses

• Soil Conditioner: Mix into garden beds and vegetable patches to boost magnesium and sulphate levels, particularly useful in soils that have been heavily cultivated or leached by rain.
• Lawn Treatment: Apply across lawns to encourage thicker, greener growth and support overall turf health.
• Vegetable & Fruiting Plants: Especially beneficial for magnesium-hungry crops like tomatoes, capsicums, roses and citrus trees, which often show visible improvement in leaf colour and fruit set.
• Seed Starting & Transplanting: A light application can help young plants establish more robust root systems early on.
• Foliar Feed: Dissolved in water and applied as a spray, Epsom Salts can be absorbed directly through plant leaves for a fast-acting nutrient boost.

How to Use in the Garden

• Soil Application: Mix approximately 1 tablespoon of Epsom Salts per litre of water and apply to the soil around the base of plants every 4–6 weeks during the growing season.
• Foliar Spray: Dissolve 1 tablespoon per 4 litres of water and spray directly onto leaves for quicker absorption.
• Lawn Application: Dissolve in water and apply evenly across the lawn using a watering can or garden sprayer.
• Always water in thoroughly after application to help the minerals move into the root zone.

Food Grade Quality You Can Trust

Being food grade, our Epsom Salts meet a higher purity standard than many general-purpose gardening products, so you can feel confident using them around edible crops, herb gardens and vegetable patches without concern over unwanted additives or contaminants.

Beyond the Garden

While formulated with garden and soil health as the primary use, food-grade Epsom Salts remain a versatile mineral compound suited to a range of other household and personal uses, including bath soaks, foot soaks and general household applications.