Bulk Rockwool Cubes | Cultiwool Donut Ring

Designed for commercial farms and hydroponic facilities, Cultiwool Rockwool Grow Cubes with Donut Ring deliver reliable rooting, precise irrigation, and consistent performance in bulk. These professional-grade cubes eliminate dry cores, improve drainage, and support predictable crop cycles at scale. Why Choose Bulk Rockwool Cubes Even irrigation: Donut-ring planting hole distributes drip flow evenly to prevent dry centers or oversaturation. Drainage built in: Bottom grooves move runoff away to reduce standing water and cleanliness issues. Stable fiber density: Consistent structure maintains uniform porosity for balanced oxygen and moisture. Commercial quality: Manufactured for large-scale farms where every block must perform the same, crop after crop. Inert medium: Enables precise EC and pH control—ideal for irrigation steering in controlled environments. Sizes & Pack Options 6″ × 6″ × 6″ (Donut Ring) Case — 48 cubes: Ideal for testing layouts or smaller zones. Pallet —