Hydrofarm RW157512 Grodan Expert 15/75 Grow Slab Growing Media for Large Vegetables and Plants, 36 x 6 x 3 Inches, Case of 12
- Grodan slabs - the final stage of planting with growing blocks are the Grodan slabs. These slabs come in clearly marked UV resistant poly sleeves for ease of use.
- Recommended for larger, long term crops with extensive roots like peppers, tomatoes, or cucumbers. Typically, seedlings in blocks are placed onto slabs.
- Grodan expert is the slab that drains The fastest because of its vertical fibers. By far the most popular slab for the hydroponic hobbyist market.
- Grodan Master is a special wet/dry slab. The top layer is thicker, which stays Wetter, while the bottom layer stays drier. In effect It defies gravity, allowing more even distribution of moisture throughout the slab.