Grodan Gro Block Improved GR10 Large 4" w/Hole 4" x 4" x 4" Strip - Unwrapped (Case of 144 Blocks) Trim Fast by Hydrofarm a single operator can prep

a single operator can prep

Suitable for use with all growing mediums and substrates

It automatically and perfectly manages the freeze drying process

Natural organic honey plus Montmorillinite

BPA-free water and air pumps

Grodan Gro Block Improved GR10 Large 4" w/Hole 4" x 4" x 4" Strip - Unwrapped (Case of 144 Blocks) Trim Fast by Hydrofarm a single operator can prepGrodan partnered with the Wageningen University and Research facility in The Netherlands and top growers throughout North America to identify the optimal stone wool substrate and irrigation strategies for specialty crops. The result of months of scientific research and trials is Grodan Gro Blocks Improved with Grodans Advanced Wetting Agent. These leading edge blocks have the optimal fiber structure and physical properties for crop uniformity, more