Grodan Gro-Block Improved GR10 Large with Hole, Unwrapped, 4" x 4" x 4" - Case of 144 Miticides Virgin and Recycled Polyethylene Terephthalate

Virgin and Recycled Polyethylene Terephthalate (PET & rPET) are BPA free

Unroll from the pack and expand the grow bag

Drying racks can be used in gardening for many purposes

Designed to warm the temperature of the rooting area approximately 10-20 F above the ambient air temperature

and so you have to purchase them separately

Grodan Gro-Block Improved GR10 Large with Hole, Unwrapped, 4" x 4" x 4" - Case of 144 Miticides Virgin and Recycled Polyethylene TerephthalateNew and improved stone wool substrate with advanced wetting technology from Grodan Introducing Grodan Gro Blocks Improved, a product specifically engineered to deliver real results for your crops, developed by plant scientists, researchers, and top growers. A core component of the "Precision Growing" philosophy, Grodan Gro Blocks Improved with Advanced Wetting Technology allow you to cultivate more uniform and high quality crops while using less water