Typically yes, space, unlimited root space, long veg season, sun's intensity, etc. will typically yeild more. But give me one plant indoors grown 18/6 or 23/1, in a 200 gallon container, and a 15 foot tall ceiling, under its own 2000 watt MH/HPS, 3 month veg, and long flower, I bet you I yeild 5 times more.