Gypsum Regular Grade | Organic Fruiting Substrate Supplementation

Regular grade organic Gypsum (Calcium Sulphate), an essential supplement additive for optimising mushroom fruiting substrate quality. Gypsum substrate or supplement plays a crucial role in providing calcium, preventing substrate clumping, and promoting robust mycelium development.  Ideal for fruiting substrate and a more economical than the fine grade gypsum which is more suited for grain substrate.

Our organic gypsum contains 23% Calcium and 17% Sulphur and is 94% pure, ensuring the highest quality for your cultivation needs. Whether you're a hobbyist or a professional grower, integrating gypsum into your substrate preparation can enhance your mushroom production.

- Calcium Enrichment: Gypsum supplies vital calcium, strengthening cell walls and supporting healthy mushroom growth.

- Improved Substrate Structure: By preventing clumping, gypsum ensures a loose, aerated substrate, facilitating efficient colonisation.

- pH Stabilisation: Gypsum helps maintain a stable pH level, creating an optimal environment for mycelium proliferation.

Incorporate up to 5% gypsum by dry weight into your mushroom substrate mix for best results. For example, add 50 grams of gypsum to 1 kilogram of dry substrate components.

250g – Great for hobbyists & small batches
500g – Ideal for regular growers
1KG – Cost-effective for ongoing projects
2KG – Best value for larger or frequent grows

• We ship from Tamborine Mountain, QLD using either AusPost or Aramex
• Fast dispatch within 1 business day (excluding Fridays) with express post options available