Grodan cultivation mat SBS 77, including plastic base, with 77 cultivation cubes

Root-friendly rockwool blocks for cuttings & seedlings – ideal for NFT, Ebb & Flow, DWC

Grodan Rockwool Cubes in sheet format (77 cubes) are a proven medium for growing in hydroponic systems. With their 4x4x4 cm pre-cut cubes, they provide a stable foundation for the germination and rooting of cuttings and seeds. The rockwool is pH-neutral, structurally stable, and offers an ideal balance of air and moisture – for strong, healthy roots from day one.

✅ Benefits at a glance

✅ 77 rock wool cubes in a practical sheet – efficient & compact
✅ pH-neutral & nutrient-inert – ideal starting conditions for plants
✅ Even moisture and oxygen supply
✅ Pre-drilled for easy use with seeds or cuttings
✅ Perfect for all hydro systems such as NFT, DWC, Ebb & Flow

🛠️ Technical features

Contents: 1 sheet with 77 dice
Cube size: 4 × 4 × 4 cm
Material: pH-neutral, chemically inert rock wool
pH value: approx. 6.0 (recommended: adjust to pH 5.5–6.0 before use)
Pre-drilling: Yes
Compatibility: Ideal for hydroponics (NFT, DWC, aeroponics, etc.)

🔧 Application & Instructions

Application:

1. Soak the sheet in pH-adjusted water (approx. 5.5–6.0) before use

2. Place seeds or cuttings into the pilot hole

3. Use tray with lid or greenhouse

4. After rooting, transfer directly into larger blocks, net pots or hydro systems

Tip: Always work with gloves, as dry rock wool can irritate skin and respiratory tract