Rockwool

Grodan Stonewool (rockwool) is made from molten rock spun into cotton candy-like fibers and then compressed into cubes, blocks, or slabs. Where other rockwool brand manufacturers cut all sizes from one batch of wool, Grodan is unique by making different...

Grodan Stonewool is a proven hydroponics growing medium preferred by garden enthusiasts everywhere. This 36" x 6" x 4" Delta Slab is perfect for "blocking on" smaller stonewool cubes and blocks to accommodate the final stages of plant growth. Slabs...

The ideal growing media for seed starts, microgreens, baby leaf crops, and more. Thinnest Grodan available. 10 x 20 inch mats fits in most propagation trays. Consistent structure results in quick and easy germination. The uniform density allows for equal...