Cultiwool 100x100x98 (4'') Cube - Large Hole (38/35)

The Cultiwool 100x100x98mm (4'') cube is a premium substrate trusted by commercial growers and home hobbyists alike. Specially engineered with an expanded 98mm depth, this cube provides a massive volume of root zone space, ensuring your plants stay stable, hydrated, and perfectly nourished as they transition from early growth to full-scale vegetative stages.

• The Perfect Large Hole (38/35): Seamlessly matches industry-standard 1.5” propagation plugs (like Cultiwool, Rockwool, or Oasis plugs). Simply drop your rooted cutting or seedling plug directly into the large pre-drilled hole without damaging delicate root strands.
• Flawless Water-to-Oxygen Ratio: Cultiwool’s advanced fiber orientation holds an exceptional volume of nutrient solution while maintaining a minimum of 10-15% air porosity. Your roots stay damp but never drowned, virtually eliminating the risk of root rot.
• Unmatched Uniformity: Every block features consistent density and fiber structure. This ensures even dry-back times across your entire grow tray, giving you predictable control over your irrigation cycles
• Completely Inert Cleanliness: Free of pathogens, weed seeds, pests, and heavy metals. You control 100% of the nutrient profile from day one.