Overview Discover top‑quality gypsum powder from Mushroom Merchant, designed for mushroom substrates and garden soil. This lab grade, calcium sulfate dihydrate powder arrives in a clean, HEPA‑filtered setting, ensuring a high level of purity and consistency. Each 1‑pound bag is crafted with care for...

Premium Gypsum Powder for Mushroom Substrate Mushroom Merchant Gypsum Powder is a lab-grade calcium sulfate dihydrate designed for mushroom growers and garden enthusiasts. Packaged in a HEPA-filtered facility, this 97% pure, ultra-fine powder dissolves smoothly and mixes easily into substrate or soil, helping create...

Mushroom Merchant Liquid Culture Premix – 100 g is a ready-to-use blend crafted to help you prepare nutrient-rich liquid culture media with ease. By combining dextrose, light malt extract, and vegetable-based peptone, this premix takes the guesswork out of measuring individual ingredients, so you...