Optimized Planting Density
The standard dual-hole layout is intended for compatible spacing for twin-stem cucumbers and peppers, supporting planned plant density.
The Grofine RB-R150S hydroponic stone wool block features a specialized dual-hole design. It accommodates the specific planting density of commercial cucumbers and sweet peppers while supporting substrate efficiency.

The standard dual-hole layout is intended for compatible spacing for twin-stem cucumbers and peppers, supporting planned plant density.
Growing two plants per block can reduce block use per plant in suitable two-plant layouts.
Even with multiple plants, the uniform fiber structure supports shared root-zone water and air management.
Consistent moisture retention across the block enables precise automated fertigation, supporting monitored dry-backs for both plants.
Brands: Multiple options available.




| Single Size (L × W × H)in | Hole Layout | Base Grooves (Bottom Drainage) |
|---|---|---|
| 6x4x2.5in(150x100x65mm) | Dual Hole | Flat / Single Groove / Multi-Groove |
| 6x4x2.5in(150x100x65mm) | Single Holes /Planting Ring | Flat / Single Groove / Multi-Groove |
| Custom | Customized | Flat / Single Groove / Multi-Groove |
Other sizes, hole diameters, layouts and groove designs are available upon request.
Can be placed onto commercial hydroponic slabs, creating a continuous, shared root environment explicitly tailored for high-density vining crops.
Compatible with dual-emitter irrigation setups, helping each seedling in the shared block receives precise and independent nutrient delivery.
Streamlines the integration of two propagation plugs into a single block, driving rapid and root establishment for commercial production cycles.
Tell us your crop type, irrigation schedule, and facility requirements.
Request technical data, evaluation samples, or custom configurations from our agronomy team.