Grodan Improved Gro-Block GR4 Strip 3" x 3" x 2.6", with Hole | Case of 48 Deep Water Culture | DWC Comes with instructional videos and

Comes with instructional videos and guides

Use after the vegetative stage or transition period when plants are ready for a stronger phosphorus and potassium bloom formula

Contains: Canadian Sphagnum peat moss (75-85%/volume)

We recommend cleaning between each use to keep all surfaces as sterile as possible

Grodan Improved Gro-Block GR4 Strip 3" x 3" x 2.6", with Hole | Case of 48 Deep Water Culture | DWC Comes with instructional videos andGrodan Improved Gro Block GR4 Strip 3" x 3" x 2. 6", with Hole Grodan's Improved Gro Blocks utilize improved hydrophilic technology and density for better water distribution and root development. Non Shrink Wrapped. Available with pre cut holes for easy planting. Block Size: 3in x 3in x 2. 6in Strip Size: 24" x 3in x 2. 6in. Blocks Strip: 8