Grodan Improved Gro-Block | 4in - Large - GR10 - 4in x 4in x 4in - with Hole - Strip

Hydrophilic Stone Wool Gro-Block for Root Development, 4in Large GR10, with Hole

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

This 4in Large GR10, with Hole block is non-shrink-wrapped strips with a pre-cut hole. A shrink-wrapped version is available as item GRD286612.

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?

non-shrink-wrapped strips with a pre-cut hole.

What size is this block?

4in Large GR10, with Hole.

Is there an alternate format available?

A shrink-wrapped version is available as item GRD286612.