Stopper Wool Rock - 2, 5x2, 5x4, 0 (x10) - Rock Wool Plug - SEM30

Rock Wool Plug - 2.5x2.5x4.0 - Rock Wool Plug - SEM30

Stone wool comes mainly from basalt, a black volcanic rock found in many parts of the world.
It is obtained by melting in a coke-heated furnace, called a cupola, at 1,460°C. The liquid material that comes out is therefore a basalt lava that is centrifuged, blown or extruded.
As soon as they are formed, the fibers are coated with urea-formaldehyde-based resin and an impregnating oil, before passing through an oven to be polymerized there, and to make the product stable and hydrophobic.
This last step is specific to horticultural rockwool, these fibers are organized to allow colonization of the substrate by the roots and facilitate water and mineral withdrawals. The substrate is then packaged in the form of flakes, plugs, cubes or bars.
Plugs are small pieces of rockwool suitable for sowing and cuttings.

Stone wool is an agglomerate of man-made fibres. The plants require frequent watering but in small quantities. You should never saturate or drown the rock wool, otherwise the roots will suffocate.

It is chemically inert, it does not degrade, retains its mechanical resistance, it does not contain pathogens, phytotoxic products, weed seeds.

The dry fibers are thin and light enough to be inhaled by the respiratory tract, the fibers, in water, are made heavier, less transportable by air currents.