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Rockwool - Grodan Uni-Slab 9.5 in x 8 in x 4 in - IncrediGrow, a-ok, aok, clone, cloner, cloning, cut, cutting, DELTA, gro, grodan, groslab, Media, rock, rockwall, rockwell, rockwool, ROCKWOOLGRODAN, seed, seedling, sponge, sponges, start, stonewool, well, wool Rockwool

Rockwool - Grodan Uni-Slab 9.5 in x 8 in x 4 in

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.

If your time is limited and you wish to simply hand water twice a week or if you have never used a GRO-SLAB™ and want to experiment with a small one first, then the UNI-SLAB™ is for you. The UNI-SLAB offers a low-maintenance, simple way for growers to have fresh herbs, healthy greens or one larger plant in a small area. By keeping the wrapping on the rockwool, nutrients and moisture last longer by slowing the evaporation process. The best part of the UNI-SLAB is that it is self contained. So if growing one large plant and disease occurs, the roots won't spread the disease to other plants.


  • The UNI-SLAB is completely wrapped thus keeping all the roots of your plant safely contained
  • Combines all the benefits of our traditional slabs with the versatility of a block
  • Wrap protects from light and outside contaminants
  • The UNI-SLAB is suitable for both top drip and flood systems