Grodan Delta 4G Rockwool Cube 75mm x 75mm Wrapped | No Hole | 6 Pack

Premium Rockwool Cubes for Stronger Roots & Faster Growth

When your growing medium gets the air-to-water balance right, everything else follows. The Grodan Delta 4G 75mm Wrapped Cube is engineered from spun basalt and limestone mineral wool to deliver exactly that — consistent moisture retention, excellent aeration, and a stable root zone that gives your plants the best possible start.

This listing is for a 6-pack of individually wrapped 75mm x 75mm cubes (no hole) — ready to use straight out of the pack for seeds, cuttings, or transplants.

Why Growers Choose Grodan Delta 4G

• Optimal air-to-water ratio — mineral wool structure holds moisture while keeping oxygen available at the root zone, driving uniform development across the whole cube.
• Spun from basalt & limestone — inert, pH-stable growing medium that won’t interfere with your nutrient solution.
• Wrapped for stability — the outer wrap holds the cube shape during handling and transplanting, reducing root disturbance.
• No hole design — flexible for multiple planting methods; use with seeds, cuttings, or place directly onto slabs or larger rockwool cubes.
• Individually packaged — easy to handle, store, and use one at a time without contaminating the rest of the pack.
• Suits commercial & home growers — consistent quality cube to cube, grow to grow.

How to Use

Soak cubes in pH-adjusted water (5.5–6.0) before use. Place your seed or cutting, then position the cube in your system. These cubes sit perfectly on top of Grodan slabs or larger rockwool blocks as part of a multi-stage propagation setup.

Specs

• Size: 75mm x 75mm
• Pack size: 6 cubes
• Material: Mineral wool (basalt & limestone)
• Hole: No hole
• Wrapping: Yes — individually wrapped
• Use: Seeds, cuttings, transplants

Perfect For

Hydroponic growers running NFT, DWC, drip, or flood-and-drain systems who want a reliable, consistent propagation medium from a trusted brand. Grodan is the global benchmark in rockwool — and the Delta 4G is their go-to cube for propagation.

In stock and ready to ship. Add to cart and get your next grow started right.