75mm grodan cube
The Delta 4G, Grodan 75mm 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.