Grodan Gro Block Improved GR6.5 Small 4" w/Hole, 4" x 4" x 2.6" Strip - Wrapped (Case of 36 Sleeves) Black Easy-to-use digital display humidity readings

Easy-to-use digital display humidity readings

Requires two brackets per dehumidifier

molybdenum and manganese for an extra micronutrient boost

100% Australian Granulated carbon

Mini Greenhouse Kits use our professional grade lighting as the catalyst for great growing

Grodan Gro Block Improved GR6.5 Small 4" w/Hole, 4" x 4" x 2.6" Strip - Wrapped (Case of 36 Sleeves) Black Easy-to-use digital display humidity readingsGrodan 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