Mined Gypsum


Gypsum (also called land plaster) is a natural mineral source of sulfur and calcium.

Additionally, it binds with clay particles to improve drainage and so mechanically improves the soil structure. By improving the soil structure, you maximize the benefits of watering and fertilizing. Also used to correct salts in the soil.

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  • Tomatoes love it!
  • Can help to prevent blossom end rot, powdery mildew, and black spot by adding the calcium tomatoes need
  • Gypsum is relatively water soluble making it a good source of fast release calcium

If you are looking to order larger quantities, come visit us at our store in Magnolia (Seattle) or contact us at orders@waltsorganic.com

*We do our best to provide you with useful, accurate information. That being said we can make no guarantees. Much of what we have posted, we believe to be common knowledge in the agricultural and horticultural worlds. In addition, we want to give credit where credit is due. Our resources page lists resources we commonly use, and encourage you to use too.

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2 lbs, 4 lbs, 10 lbs, 20 lbs


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