Grodan Stonewool Gro-Slabs Expert Fat Slab 15/100 6 in x 4 in x 36 in (case of 12)

Gro-Slabs provide the final stage for growing a spectacularly large plant. Transplant your Gro-Block plant onto a slab just like professional growers. They come in clearly marked biodegradable UV resistant sleeves for comfortable handling and algae prevention. Uni-slab - All plant roots are protected and contained for the life of the plant. Due to its size, the Uni-Slab is perfect for one large plant. Uni-Slab has the benefits of a slab with the versatility of a block. Expert slabs have vertical fibers for faster drainage; best for hobbyists. Classic slabs have horizontal fibers for slower drainage; best for hot/dry climates.

Vertical fibers in Expert slabs provide faster drainage - best for hobbyists.

Horizontal fibers in Classic slabs provide slower drainage - best for hot/dry climates.

Sizes available:

Expert Fat Slab - 36" x 6" x 4" case of 12

Expert Slab - 36" x 6" x 3" case of 12

Expert Slab - 36" x 8" x 3" case of 12

Classic Slab - 36" x 12" x 3" case of 8

Uni-Slab - 9.5" x 8" x 4" case of 16

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 types of fibers. The purpose is to support the requirement of the plant in the different plant stages. Grodan has a tremendous capacity for absorbing nutrient solution while retaining plenty of oxygen for rapid plant growth. Grodan comes in graduated sizes. Seedlings started in cubes are easily transferred to blocks and then onto slabs, if desired. Seedlings or cuttings started in the Grodan cubes can also be transplanted into more traditional planters and growing mediums.