i grow in soil myself although i bought rockwool when i decided i was gonna try cloning as the rockwools gotta be cleaner for the new roots to start off in before planting your cuttings into soil.you can place the rockwool with your well rooted clone ( takes between 10-12 days) straight into the soil.

buy yourself some of these germination sized cubes for 10p each to start your clones in a humidity dome then pop them in the soil once the roots are visible,mist the inside of the humidity dome regularly with water