Grodan Improved Gro-Block | 4in - GR40 - 8in x 8in x 4in - No Hole

Hydrophilic Stone Wool Gro-Block for Root Development, 4in GR40

Grodan Improved Gro-Block utilizes improved hydrophilic technology and density for better water distribution and root development.

This 4in GR40 block is a solid block with no hole.

Key Features & Benefits

• Improved Hydrophilic Technology — supports better water distribution throughout the block
• Optimized Density — supports consistent root development
• Graduated Sizing — moves from cubes to blocks to slabs as the plant grows
• Available in Multiple Formats — choose hole, no-hole, shrink-wrapped, or bulk pallet options

Who Should Use Grodan Improved Gro-Block

Suited to growers who want consistent water distribution and root development across propagation and finishing stages.

About Grodan

Grodan manufactures stone wool growing media, including cubes, blocks, and slabs engineered for consistent water and root development.

Frequently Asked Questions

What technology does this block use?

Improved hydrophilic technology for better water distribution.

What format is this block?

a solid block with no hole.

What size is this block?

4in GR40.

Does it support root development?

Yes, improved density and hydrophilic technology support consistent root development.