Is Gypsum Good for the Soil? Now that we have ascertained what gypsum is, it’s natural to question, “Is gypsum good for the soil?” Because it reduces salt levels in soil, it is effective in coastal and arid regions. However, it doesn’t work in sandy soils and it can deposit an excess of calcium in regions where the mineral is already abundant. Additionally, in areas with poor salinity, it pulls out too much sodium, leaving the location deficient in salt. Considering the cost of a few bags of the mineral, using gypsum for garden tilth is uneconomical. Garden Gypsum Information As a rule, using gypsum for garden tilth will probably not harm your plants, but it simply is not necessary. Using a little elbow grease and lovely organic goodies from fall clean up or compost worked into the soil to a depth of at least 8 inches will provide an excellent soil amendment. Studies have shown that soils with at least 10 percent organic matter don’t benefit from the addition of gypsum. It also has no effect on soil fertility, permanent structure or pH, while generous amounts of compost will do all that and more. In short, you can benefit new landscapes by application of gypsum on compacted soil if you have a need for calcium and have salt laden earth. But for the majority of gardeners, the mineral is not necessary and should be left for industrial agricultural use.
Read more at Gardening Know How: What Is Gypsum: Using Gypsum For Garden Tilth
https://www.gardeningknowhow.com/garden-how-to/soil-fertilizers/using-gypsum-in-garden.htm
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