Grow Mediums Multiple pots 1 tray?

[MassMom]

What an interesting idea! What about the roots? Would you let them grow freely?

I have no idea, LOL. I would be afraid they would work their way towards the mechanics of the autopot. can you trim safely???

 

[big moe]

I have a washing machine overflow pan I use. I use one Aqua valve and I usually veg 15 plants in smaller pot and transfer them to bigger pot when I strat flowering