Grodan Rooting Cube 25x25x40mm without popagation tray, with hole

Product detailed description

This practical small seedling cube (25x25x40 mm) made of mineral wool provides young plants in the early stages of development with a healthy, clean environment and a balanced water-to-air ratio. The small hole in the middle also makes it easier to place the seed or cutting correctly.

All products from the popular Grodan brand are environmentally friendly and can be used for growing plants in a grow box (indoor), in a greenhouse or outdoors in the garden (outdoor).

Rockwool cubes are manufactured in such a way that in the first stage of production, at temperatures of 1500 °C, basalt wool and calcium form the so-called stone lava, and the production process then continues by transforming this lava into thin fibres. In the final stage of the production process, the fibres are pressed into a cube of the required shape and size.

Practical use:

• Sowing seeds
• Rooting seedlings and freshly taken cuttings (clones)

Basalt wool, known as rockwool, is a perfect hydroponic medium:

• It maintains an optimal moisture and air ratio in the root zone, which supports the healthy development of a strongly branched root system, thanks to which the plant absorbs nutrients efficiently and thrives in every respect.
• It allows maximum control over the process of plant nutrition (fertilisation).
• It is a hydrophilic material. This means that it excels in its ability to retain water.
• The inert medium contains no nutrients, and therefore does not affect the electrical conductivity of the nutrient solution (EC).
• High stability of this growing medium means a minimal increase in the value of pH.
• Sterile material means that the plant can develop in an uncontaminated environment that does not encourage pests, mould formation or other factors that could threaten its vitality.
• Grodan cubes are suitable for almost all hydroponic systems including NFT or, for example, EBB&Flow.
• Grodan seedling cubes are fully recyclable, so there is also the option of repeated use. However, they must first be cleaned.
• Grodan products generally bring growers savings in water and fertilisers.

How to use Grodan seedling cubes?

• The seedling cube (as well as everything made of rockwool) is first soaked in lukewarm water at approx. 25 °C with adjusted pH, which depending on the needs of the plants being grown currently ranges between 4.8 - 6.
• Thanks to the cube's excellent absorption properties, its pH soon reaches the same value as the water in which it is soaked.
• The rockwool cube is then left to drain freely so that it gets rid of excess water. Squeezing it out is undesirable.
• The seedling cube serves its purpose until you see the plant roots growing out of it, which is the signal to transplant the plant into a larger cube.

Note: 1 tray contains 200 cubes (10 x 20).