50L Vermiculite for casing layer / hydration of mushroom substrates (Fine / Medium)

Often used to retain moisture evenly throughout substrate, vermiculite is commonly used as part of CVG and PF/BRFTek substrate creation. 

It's is available in two grades (Fine and Medium).

• Natural, non-toxic compost component
• Vermiculite is porous and holds water
• Cation exchange properties (holds nutrients in the soil)

Comes in 50L bags (Approx 5KG)