There are a few ways to do RW cubes in a larger plant style, like partially sunk into a bed of hydroton or even the small rockwool chunks, but remember that you'll need to peel the paper off the cubes so the roots can breathe and the cubes can go through healthy wet-dry-wet-dry cycles.
stinkyattic Reviewed by stinkyattic on . Question about Rockwool. I'm doing a 4x4 tray ebb and flow 600 w hps. My question is I currently have the plants 4inch rockwool that's it. Is this okay? Once the plants get bigger I will use a trellis to support them. My main concern is the root system, will I need to put something underneath the rockwool, or can I keep as it is? I've researched it quite a bit and I've noticed tons of different answers. I'm trying to build a consensus. Thanks! Rating: 5