Cultiwool Block 6" x 6" x 4" (64/Case)
The Cultiwool Block 6" x 6" x 4" (64/Case) is a professional stone wool growing block designed for hydroponic crops that require a stable, well-aerated root zone with precise irrigation control. Its uniform fibre structure supports consistent water distribution while maintaining air space around developing roots.
Each block measures approximately 6 × 6 × 4 in (15 × 15 × 9.8 cm) and provides about 2.21 L of growing volume. With 64 blocks per case, this format is well suited to commercial greenhouses, indoor cultivation facilities, hydroponic growers, and controlled-environment agriculture operations.
What Is the Cultiwool 6" x 6" x 4" Block Used For?
The Cultiwool 6" x 6" x 4" block is designed to receive rooted propagation plugs or young plants and provide a larger stone wool root zone for continued vegetative, flowering, or fruiting growth.
Its lower-profile 4-inch height offers substantial horizontal root-zone volume while remaining practical for irrigation systems, cultivation tables, gutters, and other hydroponic setups.
Key Benefits
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Professional stone wool growing block measuring 6 × 6 × 4 in.
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Metric dimensions of approximately 15 × 15 × 9.8 cm.
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64 blocks per case for commercial production.
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Approximate volume of 2.21 L per block.
- Uniform fibre structure for consistent water distribution.
- Supports a balanced air-to-water ratio in the root zone.
- Designed for rooted plugs and young plants.
- Bottom drainage grooves help improve water movement beneath the block.
- Donut-ring design helps position irrigation drippers consistently.
- Suitable for drip irrigation and precision fertigation.
- Firm construction helps maintain block shape during cultivation.
- Ideal for greenhouses, indoor cultivation, hydroponics, and controlled-environment agriculture.
Why Choose a 6" x 6" x 4" Stone Wool Block?
The 6 × 6 × 4 in format provides a broad root-zone footprint while using less vertical substrate than a 6 × 6 × 6 in block.
This makes it a practical choice for growers who want strong horizontal root development, efficient water management, and a lower-profile block for cultivation tables or irrigation systems.
The 4-inch height can also provide growers with greater control over irrigation frequency and dry-back strategy compared with larger-volume blocks.
How Does Cultiwool Support Water Distribution?
Cultiwool stone wool is designed for fast water uptake and homogeneous moisture distribution throughout the block.
Its fibre structure allows irrigation solution to spread through the root zone while maintaining air-filled pore space. This helps growers manage irrigation volume, nutrient concentration, EC, pH, and root-zone moisture with greater consistency.
What Is the Cultiwool Donut Ring?
The donut ring is a recessed irrigation area around the plug opening designed to help position drip emitters more accurately.
By guiding the dripper toward the intended irrigation zone, the donut-ring design can help distribute water more evenly through the growing block and reduce inconsistent emitter placement.
Drainage and Root-Zone Management
The bottom of the Cultiwool block incorporates drainage grooves that help excess irrigation solution move freely beneath the block.
These grooves are particularly useful when blocks are placed on cultivation tables, gutters, or solid surfaces because they help reduce direct contact between the entire block base and the surface below.
Ideal Applications
The Cultiwool Block 6" x 6" x 4" (64/Case) is suitable for:
- Hydroponic cultivation
- Drip irrigation systems
- Precision fertigation
- Indoor horticulture
- Commercial greenhouse production
- Controlled-environment agriculture
- Vegetative growth
- Flowering and fruiting crops
- Transplanting rooted propagation plugs
- Professional crop production
- High-density cultivation systems
Product Specifications
| Specification |
Details |
| Brand |
Cultiwool |
| Product |
Cultiwool 664 |
| Product Type |
Stone wool growing block |
| Nominal Size |
6 × 6 × 4 in |
| Technical Dimensions |
Approx. 150 × 150 × 98 mm |
| Approx. Metric Size |
15 × 15 × 9.8 cm |
| Growing Media |
Stone wool |
| Quantity per Case |
64 blocks |
| Volume per Block |
Approx. 2.21 L |
| Plug Opening |
Approx. 38–40 mm |
| Irrigation Feature |
Donut-ring dripper area |
| Drainage |
Bottom drainage grooves |
| Primary Use |
Hydroponic growing and root-zone development |
How Do You Use a Cultiwool 6" x 6" x 4" Block?
Condition and hydrate the block according to your crop and nutrient program before transplanting.
Once the block has reached the desired moisture and nutrient conditions, place the rooted starter plug or young plant into the opening at the top of the block.
Position irrigation emitters appropriately and adjust irrigation frequency and volume according to plant size, environmental conditions, crop stage, and desired root-zone moisture level.
Can Rooted Starter Plugs Be Transplanted Into This Block?
Yes. The Cultiwool 6" x 6" x 4" block is designed to receive rooted starter plugs and young plants.
Once the roots are sufficiently established in the starter plug, the plug can be placed into the larger block so the root system can continue developing throughout the stone wool.
Can Cultiwool 6" x 6" x 4" Blocks Be Used With Drip Irrigation?
Yes. These blocks are particularly well suited to drip irrigation and precision fertigation systems.
The donut-ring irrigation area, homogeneous fibre structure, and bottom drainage grooves are designed to support controlled irrigation and uniform root-zone management.
What Is the Difference Between the Cultiwool 6" x 6" x 4" and 6" x 6" x 6" Blocks?
The 6 × 6 × 4 in Cultiwool block has a lower profile and approximately 2.21 L of substrate volume, while the 6 × 6 × 6 in block provides a larger root-zone volume.
The 6 × 6 × 4 format is useful when growers want a broad root zone with more responsive irrigation management, while the taller 6 × 6 × 6 format provides a larger moisture and root-volume buffer.
Who Is the Cultiwool 6" x 6" x 4" Block Best For?
The Cultiwool Block 6" x 6" x 4" is particularly well suited to growers who want a professional stone wool block with a broad root-zone footprint, consistent moisture distribution, and precise irrigation control.
The 64-block case is ideal for commercial greenhouses, indoor cultivation facilities, hydroponic producers, controlled-environment agriculture operations, and professional horticultural growers.
Frequently Asked Questions
How many Cultiwool 6" x 6" x 4" blocks are included in one case?
Each case contains 64 Cultiwool growing blocks.
What are the block dimensions?
The nominal dimensions are 6 × 6 × 4 in, with technical dimensions of approximately 150 × 150 × 98 mm (15 × 15 × 9.8 cm).
What is the volume of each block?
Each block provides approximately 2.21 L of stone wool growing volume.
What is the Cultiwool 6" x 6" x 4" block used for?
It is designed to provide a controlled stone wool root zone for hydroponic plants after the propagation stage.
Can rooted plugs be transplanted into the block?
Yes. Rooted starter plugs and young plants can be placed into the block for continued root development.
Does the block have drainage grooves?
Yes. Bottom drainage grooves help improve water movement beneath the block.
Can this block be used with drip irrigation?
Yes. It is well suited to drip irrigation and precision fertigation systems.
What is the donut ring used for?
The donut-ring area helps position irrigation drippers consistently around the plug opening for more uniform water distribution.
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