No. 1 growing

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Top feature
Donut ring
  • Easy and uniform distribution of water
  • Increased water and fertilizer use efficiency
  • Improved plant cultivation & growth
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The Cultiwool substrate

A homogeneous and reliable stone wool substrate to grow a healthy and vigorous crop. That is what Cultiwool stands for. The Cultiwool substrate, available in various types and sizes, is distinguished by a strong water-absorbing capacity, uniform water distribution in the block and a better water flow under the substrate. Plus, the products are offered at competitive prices.

Cultiwool helps you and your plants grow. We do this by combining European quality, innovation and knowledge in a complete range. We focus on stone wool products of the highest quality with an eye for the smallest detail, but our strength lies in the collaboration with specialized partners in the field of technology and advice. Benefit from the flexibility and drive of a start-up in combination with the knowledge, skills and experience of a leader. All in one, together for your success.

More about us Download our product leaflet

Our stonewool products


Starter plugs

cultiwool growing blocks

Growing blocks


Growing slabs

Take advantage

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A homogeneous stone wool product is essential for unrestricted and regular root growth. Cultiwool stonewool produced in Europe is the highest quality stonewool in the market for hydroponic systems. Stonewool used in Cultiwool is certified by RHP. Therefor Cultiwool offers maximum uniformity to optimally control water and nutrient application. The result is a uniform crop that will result in higher yields, better quality, and less energy usage.

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Fast uptake of water

Reliable initial saturation is key to avoid dry spots in the substrate. Dry spots will create salt build up which results in an unbalanced block and should be avoided at all times. Cultiwool substrates have a faster and easier water uptake due to the high quality of stonewool.
This explains why stonewool used in Cultiwool is the only stonewool board in the highest category of RHP related to initial wetting-up.

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Total control

Water, EC and pH distribution can be very well controlled with Cultiwool rock wool substrates, both vegetative and generative, depending on the needs of the crop and at different moments during the cultivation.

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Unique waterdistribution

Cultiwool is the first to introduce – as quality leader – the donut ring on big blocks to improve the water distribution.
Already for many years Cultiwool has the highly appreciated drain grooves under the big
blocks to improve the waterflow under the block, specially on tables or small gutters.

Latest news

Cultiwool substrate news

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Cultiwool ECO, the introduction of the most sustainable stone wool substrate at MJBizCon 2023!

We are beyond proud to announce that in 2024 Cultiwool is coming with a new line of stone wool products, Cultiwool ECO, and its first-ever display will be in the upcoming days at the MJBizCon, the biggest 2023 B2B cannabis conference and tradeshow in the industry, at the booth of one of our distributors, Hydrotek #24019!

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MJBizCon 2023 - Cultiwool is in Las Vegas this November!

The biggest 2023 B2B cannabis conference and tradeshow in the industry is getting closer! Where will you be on November 28th to December 1st? Cultiwool and its distributors will be at the Las Vegas Convention Center for the MJBizCon for sure!

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Cultiwool & Hydrotek - Partnership that Benefits you! Request a Free Sample Now

Hydrotek and Cultiwool have a powerful partnership that started more than two decades ago! As Hydrotek is our biggest distributor in North America, we came together to think about what we can do to encourage more people in the USA and Canada to adapt and maximize their cultivation efficiency to have better results. Therefore, here we are today, launching our very first Request a Free Cultiwool Sample campaign!

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Where can I find Cultiwool?

Discover more about our Cultiwool network