Gypsum

A premium soil and substrate additive for improved structure and nutrient balance. Our high-purity agricultural gypsum is a finely ground calcium sulfate dihydrate that enhances texture, drainage, and mineral availability in your growing medium. It’s widely used in horticulture and substrate preparation to buffer pH, reduce compaction, and provide essential calcium and sulfur—critical for healthy plant and microbial growth. Specs: Composition: CaSO₄·2H₂O (Calcium Sulfate Dihydrate) Particle Size: Fine powder for easy mixing Purity: ≥95% pH: Neutral (6.5–7.5) Features: Improves substrate structure and prevents clumping Provides bioavailable calcium and sulfur Supports nutrient uptake and microbial balance Inert, odorless, and long shelf life 🛠️ Usage Tip: Add 1–5% by volume to your base substrate mix (e.g., with coco coir and vermiculite) to enhance performance and buffering capacity. Available in: 2lb, 5lb, 10lb bagsNeed larger quantities? Message us for bulk pricin