Grodan Rockwool is a mineral wool made from molten basalt and limestone rock that is spun into cotton-candy like fibres and then compressed into cubes, blocks or slabs. Being made from natural rock, Grodan is a mineral based product used in hydroponic growing applications.
SBS 36/77 propagation grow cubes are a small starter cube ideal for seeds and cuttings which will fit easily into the small hole in each cube. Each cube measures 1.5 x 1.5 x 1.5 inches (3.8 x 3.8 x 3.8cm approx.) and this product is presented in a black draining tray containing 77 cubes per tray.
The grow cubes guide the root growth downwards.
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