Grodan Gro-Block Improved Mini-Block, 1.5" - Case of 2250 Select Rockwool Type:GR6.5 Small w/ Hole, Unwrapped, 4" x 4" x 2.5" - Case of 216 Hygroben is a microbial root

Hygroben is a microbial root inoculant composed of 5 different bacillus species that are shown to be physiologically compatible with each other and work together to enhance yield

No known cross-resistance to key commercial insecticide classes

3" x 13" Weight 10

Using FloraFlex Bubbler Flow Inserts (Found in the drop down menu at the top of the page above the "Add to Cart" button)

Grodan Gro-Block Improved Mini-Block, 1.5" - Case of 2250 Select Rockwool Type:GR6.5 Small w/ Hole, Unwrapped, 4" x 4" x 2.5" - Case of 216 Hygroben is a microbial rootNew 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. A core component of the "Precision Growing" philosophy, Grodan Gro Blocks Improved with Advanced Wetting Technology allow you to cultivate more uniform and high quality crops while using less water