Grodan Improved Gro-Block GRI4 27/40 – Growing Block 7.5 x 7.5 x 6.5 cm

The Grodan Improved Gro-Block GRI4 is a professional stone wool growing block measuring 75 x 75 x 65 mm, featuring a small planting hole with a diameter of 27 mm and a depth of 40 mm. The block is specially designed for uniform root development and precise root-zone management in professional hydroponic cultivation.

The Grodan Improved product line combines an optimised fibre structure with advanced wetting agent technology. This allows water and nutrients to be distributed more uniformly throughout the entire substrate volume, supporting consistent water content (WC) and electrical conductivity (EC).

The improved substrate structure encourages fast and uniform root development, allowing young plants to efficiently utilise the available growing volume. Precise control of WC and EC makes this growing block particularly suitable for vegetative and generative crop steering strategies.

The small planting hole is designed for compatible propagation plugs. After propagation, the blocks can be combined with suitable Grodan growing slabs to support further plant development.

Benefits

• Optimised fibre structure with advanced wetting agent
• Uniform distribution of water content (WC) and EC
• Supports rapid and consistent root development
• Precise irrigation and nutrient management
• Suitable for vegetative and generative crop steering
• Stable structure throughout the growing cycle
• Compatible with suitable Grodan propagation plugs
• Ideal for professional hydroponic cultivation

Product Specifications

• Brand: Grodan
• Product line: Improved Gro-Block
• Type: GRI4 27/40
• Material: Stone wool
• Dimensions: 75 x 75 x 65 mm
• Planting hole: 27 mm diameter x 40 mm depth
• Manufacturer article number: 354552
• Sales unit: 1 growing block
• Application: Professional plant propagation and hydroponics