Grodan Gro-Block Improved GR5.6 Large with Hole, 3" x 3" x 4" (Case of 256) DUCTWORK The iron in Base A

The iron in Base A is derived from two superior chelates: Iron EDDHA

410 impact resistance requirements and ANSI Z87

Marrone Bio Stargus®Stargus® Biofungicide controls key diseases including white mold

Species chosen to attract hummingbirds to your garden

but can be costly and inefficient when using bottled CO2 tanks

Grodan Gro-Block Improved GR5.6 Large with Hole, 3" x 3" x 4" (Case of 256) DUCTWORK The iron in Base AGrodan Gro Block Improved GR5. 6 Large with Hole, 3" x 3" x 4" (Case of 256) 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