GRAIN & SUBSTRATE
Find grain, substrate materials, and amendments for your chosen mushroom-growing setup.
White Proso Millet
50 lb
Vermiculite
30 QT Professional Grade Horticultural Organic Vermiculite (30 QT, Vermiculite)
Gypsum
A mineral amendment for grain or substrate recipes that specifically call for gypsum. (50 Pounds)
Coco Coir
Coco Bliss Coco Coir 650gm Bricks (6-Pack) | Expands Up to 48 Quarts
Worm Castings
Wiggle Worm 100% Pure Organic Worm Casting Fertilizer, 30lb
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