Cultiwool Rockwool Blocks

What are rockwool blocks?

Rockwool blocks are made from spun basaltic rock fibers, creating a porous and lightweight material that retains water and nutrients while also allowing for proper airflow. Like different types of soil can be mixed for the right application, we manufacture our rockwool, especially for cannabis cultivation. This way we make sure it has the right moisture holding capacity, air-filled porosity, and moisture gradient within our rockwool blocks; properties that make these an excellent growing medium for cannabis plants, as they provide the right balance and oxygen to the roots. Cultiwool blocks come in various sizes and shapes, making them a versatile choice for growers of all levels.

Why use Rockwool blocks for growing cannabis plants?

There are a lot of benefits to using rockwool blocks as a growing medium for cannabis plants. Let’s divide those benefits into general rockwool benefits and the additional Cultiwool benefits.

General benefits rockwool blocks

• pH neutral: rockwool blocks are pH neutral, meaning that they won't affect the acidity or alkalinity of your nutrient solution. This allows you to maintain precise control over the pH levels of your plants, which is essential for healthy growth.
• High water retention: rockwool blocks have excellent water retention properties, which means that they hold onto water for longer than other growing mediums. This is particularly important for cannabis plants, which require consistent and adequate moisture to thrive.
• Good aeration: the porous nature of rockwool blocks also means that they provide good aeration to the roots, allowing better growth and the prevention of root rot.
• Hygiene: Rockwool blocks are a sterile growing medium, meaning that they are free of pollutants and harmful bacteria that can harm your plants. This makes them a popular choice for hydroponic growers, who rely on a clean and controlled environment for their crops.

These benefits are of course in effect when using high-quality rockwool. Therefore, we actually refer to our products as stone wool instead of rockwool. To guarantee homogeneous rockwool blocks for maximum uniformity, Cultiwool provides the highest quality rockwool available, produced in Europe and RHP certified. But this is not the only reason to consider Cultiwool stone wool blocks for your crop.

Cultiwool benefits: the unique product features of our rockwool blocks

It is our goal to provide growers with high-quality products that are also more efficient, easier, and safer to use. We know that small details can have a great impact; positive as well as negative. So, we improved our rockwool blocks even further, using smart solutions for daily challenges you might deal with.

• Donut ring: after initial saturation, it’s important to maintain even water distribution. The donut ring is a ring on the upper side of the rockwool block, allowing similar rates of nutrient solution to drip into the blocks. This will prevent inconsistencies in root growth.
• Cross groove technology: standard grow blocks have a single groove on the bottom so water can drain out. When placed incorrectly, this could affect the drainage of the water and thus the plant. With the cross groove pattern, this problem is solved and it improves the waterflow under the block.
• Black-white foil: for our rockwool products we use black-white foil to prevent the roots from being exposed to too much light. Overexposure to light can result in algae growth and root rot. We don’t have to tell you that’s something you don’t want.

Convinced that Cultiwool rockwool blocks are the right choice for you? Visit our distributors page to see where you can purchase your Cultiwool products.

How to use rockwool blocks for growing cannabis plants?

Using Rockwool blocks for growing cannabis plants is a relatively straightforward process. What you do need to know is that the right preparation is key, called: saturation or initial wetting. This has to be done correctly to avoid dry spots in the substrate. In this article about saturation, you will find everything you need to know, including a table with recommended values.

After soaking the rockwool blocks, don’t press or squeeze them. Carefully insert your cannabis plant into the hole, ensuring that the roots are fully covered. Water regularly with a nutrient solution that has been adjusted to the correct pH and EC levels. Want to know more about irrigation strategies? Then read our article about suitable irrigation strategies and the importance of having one.

Once your plant reaches the final phase, place your block on one of the bigger blocks or a slab. You can find our complete product range on our product page.

We are here for you

In conclusion, rockwool blocks are an excellent choice for growing cannabis plants, providing a stable and reliable growing medium that is ideal for hydroponic systems. If you're looking for a high-quality, cost-effective solution for your cannabis growing needs, be sure to consider Cultiwool rockwool blocks! And if you have any questions or remarks regarding our products or cannabis cultivation, please feel free to contact us.