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Original Growing Blocks

Reliable Performance for Strong, Uniform Growth

Cultiwool Original Growing Blocks provide a stable and steerable root environment for professional horticulture. Designed for uniform water distribution, balanced air-to-water ratios, and consistent root development, these blocks support predictable crop performance across all cultivation stages. Their proven fiber structure and integrated drainage features enable precise irrigation control, uniform plant growth, and reliable results in both medicinal and vegetable production.

Engineered for Precision and Consistency

Cultiwool Original Blocks are precision-engineered to support strong, balanced root development from the earliest growth stages through to harvest. The cross-groove base ensures efficient drainage and optimal oxygen availability, preventing excess moisture accumulation and promoting a healthy, active root zone. The integrated donut ring enhances irrigation uniformity, allowing water and nutrient solutions to distribute evenly throughout the block for consistent EC levels and moisture balance. Manufactured from high-quality stone wool with excellent dimensional stability, these blocks maintain their structure and performance during intensive crop cycles, enabling uniform growth, predictable cultivation control, and maximum productivity.

Advantages

All you need to know about Cultiwool Original Growing Blocks

Cross-groove base design – Ensures efficient drainage and optimal oxygen availability in the root zone. Integrated donut ring – Promotes uniform irrigation and consistent EC and moisture distribution. Homogeneous fiber structure – Supports even water uptake and stable root development. High dimensional stability – Maintains block shape and performance throughout intensive crop cycles. Excellent re-wetting capacity – Enables fast and uniform water absorption after dry periods. Clean and inert substrate – Provides a hygienic, pest-free root environment for reliable cultivation.

Drain grooves and donut ring

The Cultiwool substrate blocks are provided with drain grooves at the bottom to improve the waterflow under the block. This is especially useful when the substrate blocks are placed on cultivation tables and concrete floors. Another benefit of the drain grooves under the block is that it will limit the contact surface with the ground. This will avoid bringing deseases in to the plant via weak roots often in combination with too high temperatures.

As first in the industry, Cultiwool will provide the substrate with a donut ring as well, a water chamber around the plug hole to place your drippers. With the donut ring you will achieve an even more homogeneous distribution of the water throughout the block. A welcome second advantage is that you can not make any mistake anymore with the positioning of the drippers in the block.

Our growing blocks come in different dimensions and packaging units.

Downloads

Download the Cultiwool Original Blocks product leaflet

Cultiwool Leaflet Download

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Loose stone wool medium engineered for rapid drainage, high oxygen availability, and precise fertigation control in advanced hydroponic systems.

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Mini Cubes

Cultiwool Original Mini Cubes deliver precise moisture control, stable EC behavior, and excellent oxygen availability for professional propagation. Designed for uniform rooting and reliable plant establishment, they provide a strong foundation for consistent crop development.

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Original Growing Slabs

Proven stone wool slabs designed for uniform water distribution, stable structure, and reliable root zone control, ensuring predictable yields and crop uniformity throughout the cultivation cycle.

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Original Starter Plugs

Reliable stone wool Starter Plugs engineered for uniform water distribution, optimal oxygen balance, and consistent early root development, supporting predictable propagation and smooth transplanting.

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Prime Growing Blocks

Cultiwool Prime Growing Blocks deliver precise water and EC control, excellent oxygen availability, and high structural stability using natural binder technology. Designed for professional cultivation, they support uniform plant development and consistent crop steering.

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Prime Growing Slabs

Cultiwool Prime Growing Slabs deliver uniform water distribution, stable EC behavior, and excellent oxygen availability using natural binder technology. Designed for professional slab cultivation, they support consistent crop steering and reliable production performance.

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Prime Starter Plugs

Cultiwool Prime Starter Plugs deliver uniform moisture control, stable EC behavior, and optimized oxygen availability using natural binder technology. Designed for professional propagation, they support fast rooting, consistent plant development, and reliable transplant performance.

Prime Starter Plugs

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