No rockwool. It holds too much water. Expanded clay pellets are the way to go in hydro. Coco is supposed to be real good but I haven't tried it yet.
Opie Yutts Reviewed by Opie Yutts on . growing medium whats best ? I'm going to grow in coco coir, is there anything i could add to improve it,or is there a far superior medium out there alltogether, any help or advice would be much appreciated cheers Wheatie :thumbsup: Rating: 5