That might work with some clay pellets, but it is too much moisture for rockwool. Rockwool sucks, by the way. It loves to make your plants rot and drown.
Opie Yutts Reviewed by Opie Yutts on . rockwool in tubs if you are using rockwool cubes .3.5,s i think their the size of a rubics cube s if you put them in say a cut 2 litre milk carton ,can you put a 1/3 inch of water at bottom all time ,ie keep topping it up or is this to much water for the roots to sit in etc andy Rating: 5