Grodan Pro Gro-Block Improved GR4 with Hole, 3" x 3" x 2.5" (Case of 384) DUCTWORK sediment-free formula is compatible with

sediment-free formula is compatible with all common fertigation and irrigation systems

Optiplus Feature: The Cultiwool blocks

this product will work in two ways: It will reduce the population of vector insects like psyllids and leafhoppers

Apply every 3-4 weeks for flowers

Grodan Pro Gro-Block Improved GR4 with Hole, 3" x 3" x 2.5" (Case of 384) DUCTWORK sediment-free formula is compatible withGrodan Pro Gro Block Improved GR4 Small with Hole, Unwrapped, 3" x 3" x 2. 5" (Case of 384) 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