Re: Garden Geeks thread
Gypsum is a pH neutralizer for soil and adds organic material into the soil; it's usually sold as an alternative to putting down limestone to counteract the road salt put down during the course of winter. Because of the organic component to gypsum, if you have a lot of clay and use said gypsum, you can soften the soil over the course of about 10 years. Clay soil is a lack of that organic goodness your lawn craves. This won't give you that optimal soil condition of 6-12" of black dirt, but it'll make the top few inches much better for your lawn.
Originally posted by CLS
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