40mm grodan cube

The MM40, Grodan 40mm Cube, is designed for propagation.
It is suitable for both seed raising and cuttings.
It is made of Rockwool (spun basalt) and is a perfectly sterile medium.
The cubes should be washed with warm pH adjusted water set at 5.5 before use and should kept moist but not saturated once seeds/cuttings have been planted.
Over watering can inhibit root development as well as making the plant more susceptible to root rot.