Grodan Rockwool 40/40 Cubes – The Gold Standard for Precision Hydroponic Growing

Tired of unstable seed starters or poor root development? Grodan’s laboratory-grade rockwool cubes deliver the perfect air-to-water ratio for explosive root growth in hydroponics, cloning, and propagation.

Why Professional Growers Choose Grodan 40/40 Cubes

✔ Optimal 80/20 Water/Air Ratio – Precisely engineered delta gro technology prevents over/underwatering
✔ Foolproof Propagation – Works for direct seeding or transplanting rooted clones
✔ Superior Drainage – Unique grooved base design prevents waterlogging (even with new growers)
✔ Consistent Performance – Each 1.5" cube (3.8cm) is individually wrapped for sterile use

Grodan vs. Cheap Rockwool – Spot the Difference

Rockwool Cubes Setup Tips

1. No Pre-Soak Needed – Grodan’s RINSED technology means just wet and plant

2. Clone Perfect – Use with 45° angled holes for maximum stem contact

3. Hydroponic Ready – Seamlessly transfers to NFT, DWC, or drip systems

Who Trusts Grodan 40/40?

• Commercial Lettuce Farms – 98% germination rates in aeroponic seed walls

• Cannabis Cloners – Roots 2 days faster than peat pellets

• University Labs – Preferred medium for controlled nutrient studies

• Urban Microgreens – Reusable for 20+ cycles with steam sterilization

"After testing 7 starter media, Grodan gave us 100% transplant success with zero damping-off disease." – HydroGreen Advisory Report 2023

---

Technical Specs:

• Dimensions: 1.5 x 1.5 x 1.5 inches (3.8cm³)

• Planting Depth: 0.5" for seeds, full depth for clones

• Compatibility: Fits all standard propagation trays

Available In:

• 36 cubes/pack (small farms)

• 100 cubes/case (commercial ops)

• Slab options for large-scale propagation

---

Make Your Next Grow Foolproof – Grab Grodan Rockwool CubesToday!