Therm-O-Rock Super Coarse Horticultural Vermiculite - 4cu ft - Super Coarse - OMRI® Listed Mushroom Supplies fast-acting source of major nutrients

fast-acting source of major nutrients

Maximum output is 75 pints per day

for a food source

The contains a blend of hormones

Therm-O-Rock Super Coarse Horticultural Vermiculite - 4cu ft - Super Coarse - OMRI® Listed Mushroom Supplies fast-acting source of major nutrientsTherm O Rock Vermiculite is a soil additive that uses its accordion like particles to amend soil by retaining water, improving aeration and prolonging nutrient release. Its ability to retain both air and water makes vermiculite ideal for conditioning container soils. Vermiculite can also be used for seed germination, bulb storage and flower arranging. OMRI Listed.