Grodan mini block, 4x4 cm, 1 strand of 15 pieces.

Compact rockwool cubes in strands – for controlled cultivation and efficient handling

Grodan mini blocks, available in a string of 15, are the perfect solution for gardeners who value efficiency, cleanliness, and root quality. The 4x4 cm rockwool cubes are pH-neutral, pre-drilled, and air/water optimized—ideal for growing cuttings or seeds in hydroponic systems, mini greenhouses, or for preparing for larger Grodan cubes.

✅ Benefits at a glance

✅ 15 pre-drilled rock wool cubes in a strand – ready for immediate use
✅ pH-neutral & dimensionally stable – perfect foundation for young plants
✅ Even air/water distribution – ideal root development
✅ Clean handling due to continuous strand
✅ Perfect for DWC, NFT, Ebb & Flow & aeroponic systems

🛠️ Technical features

Contents: 1 strand with 15 cubes
Cube size: 4 × 4 × 4 cm
Material: rock wool (chemically inert, pH-neutral)
pH value: approx. 6.0 (recommendation: prior adjustment to pH 5.5–6.0)
Pre-drilling: Yes
Compatibility: Hydroponics, NFT, DWC, Aeroponics, Soil

🔧 Application & Instructions

Application:

1. Soak strand in pH-adjusted water (approx. 5.5)

2. Insert seeds or cuttings into the pilot hole

3. Place in greenhouse, propagator or hydro system

4. After rooting, transplant directly into larger blocks or net pots

Tip: Optimal in combination with LED grow lights & rooting gel

Note: Do not touch dry rock wool directly – risk of irritation to skin and respiratory tract