🌱 Grow smarter, not harder — the pro’s choice for hydroponic success!
The 4 Inch Redrock Rockwool PRO Grow Block is a premium, US-made stone wool substrate designed for commercial hydroponic agriculture. Its high fiber density optimizes water and fertilizer use while allowing essential dry back, promoting robust root development. Each 4x4x4 inch block features 42/40 holes for versatile crop propagation and comes with a Twin Canaries Liquid Volume Conversion Chart to enhance nutrient management.
| Package Dimensions | 30.81 x 20.19 x 9.7 cm; 381 g |
| Material type | Stone Wool |
| Moisture needs | Moderate Watering |
| Sunlight exposure | Full Sun |
| Manufacturer | Twin Canaries Liquid Volume Conversion Chart |
| ASIN | B0949TQN76 |
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