Grodan rock wool block, 10 x 10 x 6.5 cm, large hole

Stable growing block for advanced plant phases & net pot integration

The Grodan 10×10×6.5 cm block with a large planting hole is the ideal solution for anyone who wants to safely transfer pre-grown young plants (e.g., from 4×4 cm cubes) into a larger root volume. The block's size provides ideal nutrient and moisture buffering and fits perfectly in net pots for DWC, Ebb & Flow, or other hydroponic systems.

✅ Benefits at a glance

✅ Large planting hole – perfect for Grodan mini blocks or direct transplanting
✅ Structurally stable & pH-neutral – no disintegration, no nutrient binding
✅ Promotes strong root growth through high air/water capacity
✅ Ideal for net pots, hydro systems & professional cultivation stages
✅ Can be used individually or combined with Grodan panels

🛠️ Technical features

Dimensions: 10 × 10 × 6.5 cm
Planting hole: Large, pre-drilled (suitable for 4×4 cm mini blocks)
Material: pH-neutral, chemically inert rock wool
pH value: approx. 6.0 (recommendation: soak with pH 5.5–6.0)
Use: Single block or in combination with plates & trays

Compatibility:
– DWC, Ebb & Flow, NFT, net pot systems, aeroponics

🔧 Application & Instructions

Application:

1. Soak the block in pH-regulated water (5.5–6.0)

2. Plant cuttings, seeds or mini-blocks

3. Place directly into a net pot or hydro tray

4. Controlled supply of nutrient solution & ensure drainage

Tip: Particularly stable in growth in combination with 10 cm net pots

Note: Do not process rock wool dry – protective clothing recommended