top soil on rockwool?
not a great idea reggaeboy.
i'll assume you meant....dig them out of the rockwool and transplant to soil?
That mold is currently sending out mad spores, which will find many suitable places on other rockwool cubes and propagate.
they will compete for nutrients, grow, exude (probably) toxic chemicals into the rockwool, etc etc. would you want any vegetable plant to be covered in mold?
if you ever get buds, and have that mold in the room, it will quite easily get on the buds, consuming them, making them unfit to be smoked, and all your effort will go down the drain. to be safe, you need to get all moldy things OUT of that room, destroy them, clean the room as thoroughly as you can.
mold is bad.