Cultiwool Rockwool Slabs

If you are a cannabis grower looking for the perfect growing medium to maximize your yields, look no further. Cultiwool rockwool slabs are used all around the world by professional growers because of the high-quality rockwool we provide. These slabs are made from natural, sustainable materials and offer numerous benefits for cannabis cultivation. The perfect medium to provide the final stage for growing crops.

  • High quality rockwool substrate
  • Also available: the mini slab
  • The solution for every growing system
  • Plant holes can be pre-cut in the slabs
  • A perfectly stable growing environment

Hydroponic rockwool slabs

Hydroponic is a method of growing plants in a soilless medium, like rockwool (also known as stone wool). Hydroponic rockwool slabs are designed to provide an inert and stable environment for plants’ roots to grow in. They offer several advantages over other growing media, such as soil or coco peat, including better water retention, improved drainage, and easier nutrient uptake. Are you interested or in need of some more information about hydroponic rockwool slabs?

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The best rockwool growing slabs

At Cultiwool, we specialize in providing high-quality rockwool slabs for cannabis growers around the world. We understand the importance of using the right medium for your cannabis plants, and we are dedicated to helping you achieve the best results possible. Not only are our rockwool slabs known for their homogeneity and uniformity, we can also provide our rockwool slabs with a horizontal fiber instead of the standard vertical fiber. We simply have the best rockwool growing slabs available on the market.

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The Cultiwool rockwool slab sizes

Our rockwool growing slabs come in all different sizes. We even have a rockwool mini slab. A very popular choice among growers and a great alternative for cutting rockwool slabs. This way the mini slab stays packed in foil, no risks are taken with bacteria, and it will spare you a lot of time. Another option we offer is the pre-cut holes in slabs. We have a solution for almost every hydroponic growing system and the required substrate volume per crop. Visit our special rockwool slab page to discover all the available slab sizes or download our Cultiwool product leaflet.

Download the Cultiwool product leaflet

How to use rockwool slabs

Using rockwool slabs for cannabis cultivation is relatively simple and straightforward. Here's a step-by-step guide on how to use rockwool slabs for your cannabis plants:


  • Preparation: Before using Rockwool Slabs, it is essential to prepare them properly. Soak the slabs in a nutrient solution with EC of 1.5 to 2.5 mS/cm and a pH of 5.5 to 5.8. Make sure you avoid dry spots in the rockwool slabs, as this can lead to less uniform plant growth and also to lower yield.
  • Place Your Plants: Once your rockwool slabs are prepared, you can place your cannabis plants directly onto the rockwool slabs. Make sure to avoid damaging the delicate root system when transplanting your cannabis plant.
  • Add Nutrients: Water the slabs with an appropriate nutrient solution, make sure not to overwater. Cultiwool’s rockwool slabs are designed to retain water and nutrients, so it is essential to be careful not to overfeed your plants.
  • Monitor Moisture: Monitor the moisture levels of the rockwool slabs regularly. You do not want the slabs to be too wet or too dry, as this can impact plant growth and health.
  • Adjust pH Levels: Rockwool slabs are pH neutral, which means they will not interfere with the pH balance of your nutrient solution. However, it is still important to regularly monitor and adjust the pH levels of your nutrient solution to ensure optimal plant growth.
  • Harvest: Once your cannabis plants have reached maturity, it is time to harvest them. Carefully remove the plants from the Rockwool Slabs, taking care not to damage the delicate buds.


Using hydroponic rockwool slabs for cannabis cultivation is an excellent choice for growers who want to maximize yields and simplify their growing process. By following these steps, you can ensure that your plants receive the proper nutrients, moisture, and pH balance they need to thrive. Are you looking for more information about cannabis cultivation and rockwool as a substrate? Visit our knowledge page!

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Convinced about our rockwool slabs?

So if you are looking for the perfect medium for your cannabis cultivation needs, look no further than Cultiwool’s rockwool slabs. Contact us today to learn more about our products and how they can help you achieve the best results possible! We help you to your nearest distributor who has Cultiwool rockwool slabs for sale.

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Our advantages

  • Worldwide distribution

  • European quality

  • Homogenity and uniformity

  • Especially manufactured for cannabis cultivation

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