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We support operations & licensed facilities with volume pricing, dedicated account managers, and custom equipment consultation.
Struggling with inconsistent water distribution and poor drainage in your hydroponic setup? The Cultiwool 3" x 3" x 3" Growing Blocks provide a professional-grade solution designed to eliminate dry spots and ensure your plants receive uniform hydration. For starting seeds or clones, we recommend using Cultiwool 1.5" cubes before transplanting into these 3" blocks for the next stage of growth.
These premium stonewool blocks are engineered for growers who demand precision. Each 75mm x 75mm x 75mm block features rapid water absorption and uniform distribution technology, maintaining the consistent moisture levels essential for vigorous root development. If your plants require more root volume for longer veg cycles, consider stepping up to the Cultiwool 4" x 4" x 4" Growing Blocks.
Cultiwool's innovative design incorporates cross grooves at the bottom to enhance airflow and drainage, significantly reducing the risk of root pathogens. The integrated black/white foil wrapping is a critical feature that prevents algae growth while optimizing light management within your growing environment.
Industry-first water chamber ensures precise dripper placement and uniform saturation.
Bottom grooves improve water flow and minimize disease risk from root pathogens.
Black/white foil prevents algae growth and maintains optimal light management.
High-quality European stonewool provides consistent texture and reliable water retention.
| Specification | Value |
|---|---|
| Material | Premium European Stonewool |
| Dimensions | 3" x 3" x 3" (75mm x 75mm x 75mm) |
| Plug Hole Size | 38mm / 40mm |
| Quantity per Case | 400 Blocks |
| Foil Type | Black/White Light-Proof Foil |
| Features | Donut Ring & Drainage Grooves |
It is an industry-first water chamber design on top of the block that ensures your dripper stays in place and water is distributed homogeneously throughout the entire block.
These blocks feature a standard hole that fits 38mm to 40mm rooting plugs, such as the Cultiwool Round Macro Plugs.
No, the black/white foil should remain on the block. It is designed to prevent algae growth on the substrate and help manage light reflection.
The cross grooves improve drainage and air circulation under the block, preventing water from pooling and reducing the risk of root rot and other pathogens.
These 3" x 3" x 3" blocks are sold exclusively by the case, with 400 blocks per case, to ensure the best value for professional and hobbyist growers.
Our specialists are happy to help. Call us or send a message and we'll get back to you within one business day (most of the time within a few hours.)
Equipping home growers, craft producers, and commercial operations across North America since 2016.