Epsom Salt for Lawns: The £1 Bath Aisle Trick

Reports are increasingly appearing in gardening forums and on social media about a tip that sounds almost too good to be true: rather than buying expensive specialist fertiliser, amateur gardeners are scattering an inexpensive product from the bath aisle over their lawns, costing roughly £1. This is not a mysterious miracle cure, but a long-established mineral salt that can address a very specific soil deficiency.

What this inexpensive bath additive does for lawns

The widely discussed suggestion involves Epsom salt, chemically known as magnesium sulphate. This crystalline salt is generally sold in chemists and supermarkets for relaxing foot soaks or full baths, although it is also available from garden retailers as a fertiliser ingredient.

Magnesium has a vital function in plants: it forms the central part of the chlorophyll molecule, the pigment that makes leaves green. When grass does not have enough magnesium, it cannot use light energy as effectively, grows more slowly, and may look dull or yellowish. This is where the trend comes in: correcting a genuine deficiency can help stimulate growth again.

“Magnesium is rather like the engine of chlorophyll – when it is missing from the soil, the lawn often shows it clearly.”

Gardeners using Epsom salt report the following effects on weakened areas:

• faster return to green growth after winter