Cultiwool Rockwool Grow Cube 6"x6"x6" with Donut Ring

Built for Even Irrigation & Faster Root Development

Cultiwool’s 6×6×6 rockwool blocks are engineered for high-performance cultivation. A donut-ring planting hole surrounds the plug position to spread drip flow evenly, while drain grooves on the base move water away from the cube and across benches or tables. The result is consistent moisture distribution, strong oxygenation, and aggressive root growth.

• Donut ring chamber helps eliminate dry cores and hot spots under drippers.
• Bottom drain channels improve runoff on flood tables, rolling benches, and concrete floors.
• Dimensionally stable fiber supports air-filled porosity and uniform steering.
• Inert & consistent media for precise EC and pH control throughout the crop cycle.
• Starter-plug ready—accepts standard 1.5″ propagation cubes.

Why Growers Choose Cultiwool Blocks

• Uniform fiber density for predictable irrigation response and faster dry-backs.
• Clean manufacturing with low dust and reliable cube dimensions case after case.
• Better plant hygiene—reduced contact surface with the ground to limit disease pressure.

Quick Specs

• Size: 6″ × 6″ × 6″ (approx. 150 × 150 × 150 mm)
• Top: Center planting hole with integrated donut ring
• Base: Molded drain grooves
• Case Count: 48 blocks
• Pallet Count: 576 blocks (12 cases)
• System Compatibility: Top-feed drip, ebb & flow/flood tables, run-to-waste

How to Prep & Use

1. Condition the media: Pre-soak cubes with pH-adjusted solution (~5.5–5.8) to fully saturate, then allow to drain to target water content.
2. Plug placement: Insert a 1.5″ propagation cube into the planting hole; position the dripper in the donut ring for even wetting.
3. Irrigation steering: Maintain consistent dry-backs and 10–20% runoff when feeding to keep EC in range and roots active.

Frequently Asked

What does the donut ring do?
It acts as a small water chamber around the plug to distribute drip flow evenly so the core hydrates without over-soaking the sides.

Do I need special tables?
No—drain grooves work on flood tables, benches, or clean hard floors to move runoff away from the cube.

Can I reuse these blocks?
For best plant health and uniformity, rockwool blocks are typically used for a single crop cycle.