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Gypsum Powder for Mushroom Substrate (5 lb) | Lab Grade | Packed in a HEPA-Filtered Facility | Highly Soluble for Growing Mushrooms | Soil Conditioner | (Calcium Sulfate Dihydrate) (5 Pounds)

Gypsum Powder for Mushroom Substrate (5 lb) | Lab Grade | Packed in a HEPA-Filtered Facility | Highly Soluble for Growing Mushrooms | Soil Conditioner | (Calcium Sulfate Dihydrate) (5 Pounds)

Regular price $28.49 USD
Regular price Sale price $28.49 USD
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About This

  • [Mycology Grade] - Made with the mushroom grower in mind. Packaged in a HEPA filtered facility by experienced mycologists. This ensures no contaminants will enter your grow area.
  • [High Purity] - 97% calcium sulfate dihydrate. Ultra fine and highly soluble in water, making it easy to mix.
  • [Improves Soil Structure] - Reduces clumping and allows for better absorption of water. Gypsum also provides essential minerals for increased yield. Gypsum can also repair damage from excess salt in soil.
  • [Versatile Substrate Amendment] - Use gypsum for mushroom substrate, your garden, landscaping, grain spawn, and so much more. Supports plant health and can increase yield by 50% or more when added to mushroom fruiting blocks. Best known as an essential ingredient in CVG, which is a substrate blend of coco coir, vermiculite, and gypsum.
  • [Affordable Quality] - Quality you can trust at a price that doesn't break the bank. Every day, we strive to provide the most value to our customers.
  • [100% USA Made] - Mined, refined, and packed proudly in the USA. Our goal is to make your growing experience easy and enjoyable.

Overview

  • Brand : Mushroom Merchant
  • Item Weight : 5 Pounds
  • Item Form : Powder
  • Coverage : Gypsum to Substrate Ratio 1:10
  • Mixing ratio : 1:10
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Frequently Asked Questions

We want you to love your purchase.If you're not completely satisfied, you may return your unused item within 30 days of delivery.Please note: The item must be in its original condition and packaging. Return shipping costs are the responsibility of the customer unless the item arrived damaged or defective.To start a return, simply contact our support team with your order number.

Most orders are processed within 3–5 business days, and fully prepared for shipping within 4–6 business days.Standard shipping within the continental U.S. typically takes 3–8 business days, depending on your location.For made-to-order or specialty items, please allow a little extra time—we’ll always keep you updated with tracking info.

We’ll notify you within 48hours. You can wait for restock, choose a similar product, or request an immediate refund—your choice.