Gardening - Q&A: Difference Between Gypsum and Lime

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Q&A: Difference Between Gypsum and Lime

National Gardening Association

Question: What is the difference between gypsum and lime?

Answer: 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.

Content provided by the National Gardening Association