Introducing Grodan Gro-Blocks Improved, a product specifically engineered to deliver real results for your crops, developed by plant scientists, researchers, and top growers.

Buy the Grodan Delta Gro-Blocks at Hydrobuilder.com. Shop the entire line of Grodan products along with thousands of hydroponics supplies on sale now.

Grodan Rockwool / Stonewool 4 Inch Gro Blocks. Grodan partnered with the Wageningen University and Research Facility and top growers to determine the optimal stone wool …

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 …

Grodan Improved Gro-Block - GR4 Small - 3-Inch x 3-Inch x 2.6-Inch - Strips with Hole (Case of 384) (12/Plt): This compact Gro-Block is perfect for small plants or seedlings. The pre-cut hole …

The Grodan Gro-Blocks provide the foundation your plants need for healthy root development, vigorous growth, and optimal crop production. The stone wool substrate allows professional …

Improved Gro-Blocks, we’ve noticed a significant difference. We’re getting healthy root acceleration all the way through, even block saturation from top to bottom, and they react …