Lawns and Gypsum - Knowledgebase Question

Greensboro, No
Question by sherri272
June 30, 2010
I recently read that gypsum will loosen compacted soil and make it more conducive to growing grass. I have looked for gypsum, but cannot seem to find it. Is gypsum the same as lime and, if not, where should I look for gypsum? Thanks so much...

Answer from NGA
June 30, 2010


They are not the same. Gypsum is calcium sulfate, and lime is calcium carbonate. Adding lime increases the pH of the soil. Gypsum is often used as a source of calcium on soils that wouldn't benefit from increasing the pH and to loosen compacted, clay-type soils. Gypsum is usually sold in large bags in garden centers in the same area as soil amendments and fertilizers. Good luck!

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