- 216 x Cultiwool 4" x 4" x 2.5" Rockwool Growing Blocks
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Cultiwool 4" x 4" x 2.5" Growing Blocks (216 Blocks/Case)
starting from 0% interest financing from
/mo.
- 216 blocks per case with 100mm x 100mm x 65mm dimensions
- 38mm to 40mm plug hole size fits standard propagation media
- Features bottom drainage grooves and a top donut ring water chamber
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VOLUME PRICING
Commercial & Bulk Purchasing
We support operations & licensed facilities with volume pricing, dedicated account managers, and custom equipment consultation.
- You are managing a hydroponic setup because you want to eliminate inconsistent moisture and root diseases across your growing blocks.
- You are upgrading your propagation media because your current setup suffers from dry spots and waterlogging during daily watering cycles.
- The donut ring technology ensures precise dripper placement so water distributes evenly throughout the entire block.
- Bottom grooves improve water flow and reduce ground contact, helping minimize the risk of root pathogens.
- The black and white foil wrapping stops algae from growing while reflecting light back toward the plant canopy.
- Growers using these blocks say they stopped seeing dry spots and waterlogging once the uniform water distribution kicked in.
- Operators who switched to these blocks say the algae prevention wrapping keeps their setup clean and manageable over long cycles.
Cultiwool 4" x 4" x 2.5" Growing Blocks (216 Blocks/Case)
Struggling with inconsistent moisture and root diseases in your hydroponic setup? The Cultiwool 4" x 4" x 2.5" Rockwool Blocks provide the professional-grade solution for uniform water distribution and superior drainage. These premium stonewool blocks are designed for growers who demand reliable propagation media with advanced water management. Each 100mm x 100mm x 65mm block utilizes rapid absorption technology to eliminate dry spots and waterlogging. If you require larger volumes for later stages, consider the Cultiwool 4 x 4 x 4 blocks for expanded root capacity.
What's Included
Features
🍩
Donut Ring Tech
Industry-first water chamber ensures perfect dripper placement and homogeneous water distribution throughout the block.
💧
Drainage System
Bottom grooves improve water flow and reduce ground contact, minimizing disease risk from root pathogens.
🛡️
Algae Prevention
Black/white foil wrapping prevents algae growth while maintaining optimal light management for healthy development.
⭐
Premium Quality
High-quality European stonewool provides consistent texture and reliable water retention for professional results.
Specifications
| Specification | Value |
|---|---|
| Material | Premium Stonewool |
| Dimensions | 4" x 4" x 2.5" (100mm x 100mm x 65mm) |
| Plug Hole Size | 38mm / 40mm |
| Quantity per Case | 216 Blocks |
| Special Features | Donut Ring, Drainage Grooves, Black/White Foil |
| Selling Unit | Case Only |
FAQs
What is Donut Ring technology?
It is a specialized water chamber design on the top of the block that ensures precise dripper placement and uniform water distribution throughout the entire substrate.
Can I use these with Cultiwool rooting plugs?
Yes, these blocks feature a 38mm/40mm hole designed to fit Cultiwool round macro plugs or similar propagation media perfectly.
How does the foil wrapping benefit my plants?
The black/white foil prevents algae growth on the surface of the rockwool while reflecting light back toward the plant canopy, optimizing growth conditions.
What are the drainage grooves for?
The cross grooves at the bottom improve airflow and drainage, reducing the risk of root-borne pathogens by minimizing direct contact with the growing surface.
Is this product suitable for commercial hydroponics?
Absolutely. Cultiwool is high-quality European stonewool trusted by professional growers worldwide for its consistency and performance.
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Questions About This Product?
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.)
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