Mctuffet, don't you think that hydro can have 20 plants.. flower them at 6-10 inches and get 16-24 ounces..

I don't think it shold be a problem..

Now a 1000 would be ideal.. or even 2 1000's but- hydro should be able to get the hang of the system with a 420 in a 4x4x6 area.

Not that it was ideal, but there was this "grow room" that had 300 plants in a 4x6x6 room, with 4 - 600's and it yielded 5lbs.