Grodan Improved Gro-Block | 4in - Small - GR6.5 - 4in x 4in x 2.6in - Strips - Pre-Cut Holes - Shrink Wrapped

Hydrophilic Stone Wool Gro-Block for Root Development, 4in Small GR6.5, Shrink Wrapped

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

This 4in Small GR6.5, Shrink Wrapped block is shrink-wrapped in strips with pre-cut holes. A non-shrink-wrapped version is available as item GRD286605.

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?

shrink-wrapped in strips with pre-cut holes.

What size is this block?

4in Small GR6.5, Shrink Wrapped.

Is there an alternate format available?

A non-shrink-wrapped version is available as item GRD286605.