Grodan Gro-Block Improved GR7.5, 4" x 4" x 3" (Case of 192) ventilation 05% Chelated Manganese (Mn)

05% Chelated Manganese (Mn)

3% of manganese

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The prop is constructed with 5052 aluminum alloy engineered to precise geometry for quietness and air-moving efficiency

All 4' end caps include designated drain sections

Grodan Gro-Block Improved GR7.5, 4" x 4" x 3" (Case of 192) ventilation 05% Chelated Manganese (Mn)Grodan Gro Block Improved GR7. 5 Medium with Hole, 4" x 4" x 3" Case of 192 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