Grodan Gro-Block Improved GR10 Large with Hole, 4" x 4" x 4" (Case of 144) lighting-systems/kits Humic Acid: With a humic

Humic Acid: With a humic acid content of 10%

bassiana spores adhere to the target insect's outer shell (cuticle) and begin the infection process

When ‘brewed’ with oxygen

use them when leafminers are expected to begin populating plants or as soon as damage is seen

Grodan Gro-Block Improved GR10 Large with Hole, 4" x 4" x 4" (Case of 144) lighting-systems/kits Humic Acid: With a humicGrodan Gro Block Improved GR10 Large with Hole, 4" x 4" x 4" Case of 144 New and improved stone wool substrate with advanced wetting technology from Grodan Introducing Grodan Gro Blocks Improved, a product specifically engineered to deliver real results for your crops, developed by plant scientists, researchers, and top growers. The uniform distribution of water and nutrients throughout the block allows for more efficient use of the entire substrate