  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.
The expert slabs have vertical fibers for faster drainage and are best for hobbyists. The classic slabs have horizontal fibers for slower drainage and are best for hot/dry climates. Choose from four sizes of Rock Wool growing blocks. Rock Wool slabs are sold by the case only. The price listed is per case:
- Expert Fat Slab: 36" X 6" X 4" - 9 Slabs per case
- Expert Slab: 36" X 6" X 3" - 12 Slabs per case
- Expert Slab: 36" X 8" X 3" - 12 Slabs per case
- Classic Slab 36" X 12 " X 3" - 8 Slabs per case
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