Grodan propagation cube 36x36x40 mm without propagator, 1 pc

Product detailed description

A smaller propagation cube (36x36x40 mm) made of mineral wool provides young plants in the early stages of development with a healthy, clean environment and a balanced ratio of water and air.

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 fine 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, represents a perfect hydroponic medium:

• It maintains an optimal balance of moisture and air 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 (fertilising).
• It is a hydrophilic material. This means that it excels at retaining water.
• The inert medium contains no nutrients, and therefore does not affect the electrical conductivity of the nutrient solution (EC).
• The high stability of this growing medium means a minimal increase in 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.
• Rockwool cubes are suitable for almost all hydroponic systems including NFT or, for example, EBB&Flow.
• Grodan propagation cubes are fully recyclable, so there is also the option of repeated use. However, they must be cleaned first.
• Grodan products generally bring growers water and fertiliser savings.

How to use Grodan propagation cubes?

• The propagation cube (like everything made of rockwool) is first soaked in lukewarm water at a temperature of approx. 25 °C with adjusted pH, which depending on the needs of the plants currently being grown 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 loses excess water. Squeezing it out is undesirable.
• The propagation 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.