Therm-O-Rock Vermiculite Coarse, 4cu ft Organic Nutrients Also controls up to six

Also controls up to six AC Infinity Cabinet and USB Fans

Slanted front window for easier closeup viewing

High calcium content: Supports cell-wall strength

Designed for use during bloom

For best results with dry bucking

Therm-O-Rock Vermiculite Coarse, 4cu ft Organic Nutrients Also controls up to sixTherm O Rock Vermiculite Medium #3A Therm O Rock Vermiculite is a versatile soil additive valued for its ability to retain water, improve aeration, and prolong nutrient release through its unique accordion like particle structure. Ideal for conditioning container soils, vermiculite helps create a balanced growing environment by holding both air and moisture. It can also be used for seed germination, bulb storage, and flower arranging. Made from a