Description
Zero CFM loss
FDA approved
and other industrial related uses
The 78-cell side is for 1
It’s a measure of the difference between vapor pressure in the leaves of your plants and the air surrounding them
Grodan Gro-Block Improved GR5.6 Large (3x3x4) w/Hole HRG Zero CFM lossGrodan Improved GR5. 6 Large 3"x3"x4" Gro Blocks optimized wool structure allows for faster rooting in and nutrient solution replenishment. New and improved wetting agent and hydrophilic technology greatly enhances the water characteristics giving even better water distribution over the height of the block. This results in greater plant development and steerability and more efficient use of water and nutrients. All while the Gro Block Improved