Epsom Salt on Lawns: Only If Soil Test Shows Magnesium Deficiency

Epsom salt (magnesium sulfate) supplies only Mg and S. Lawns primarily need N-P-K (nitrogen, phosphorus, potassium). Unless a soil test confirms Mg deficiency (rare), don't apply. Over-application can burn grass due to salt content.

Standard fertilizers (e.g., 29-3-4) provide N-P-K in ratios grasses consume heavily. Magnesium is usually adequate in most soils; sulfur rarely lacking.