Grodan Gro-Slabs Growing Media

Seven minutes—packed with info! We take a look at Grodan A-OK starter plugs (rockwool cubes), Grodan Delta 3-inch and 4-inch rockwool blocks, Hugo 6-inch blocks, Big Mamma 8-inch blocks, Unislabs and loose fill rockwool growing media. We cover pre-soaking rockwool, adjusting pH, charging up with hydroponic nutrients, hardening off seedlings and cuttings, and transplanting into soil and soilless media such as coco coir.

Gro-Slabs provide the final step for growing a massively 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 contained and protected for the life cycle of the plant. Due to its size, the Uni-Slab™ is ideal for one large plant. Uni-Slab ™has the benefits of a slab with the versatility of a block. All Gro-Slabs have vertical fibers except the 12 inch Gro-Slab, which has horizontal fibers.

Spectrum Hydro is an authorized supplier of  Grodan Gro-Slabs Growing Media.