You have a couple of different options here. Obviously the main goal is to get the heaviest crop from the 3.2x3.2 area. With a 250 watt light and the right genetics half a pound IS achievable but to do so, you must have your area dialed in and your environment perfect.
That said, here are a few ideas.
1. twice as many 6'' pots with little or no veg time. I would imagine you can fit almost 36 if my math is correct. This way you would only need 7g/plant to hit your 1gpw mark, which is very realistic. Also your veg time will be cut significantly.
2. Do a scrog larger pots or a soil bed and do less plants, say 3-5, and train them to fill in the gaps.
I always thought growing larger plants was the way to go, but after seeing friends results with using 2-4x more plants, they are yielding the same or higher in a much shorter time.
Also the method used is VERY strain dependant and this is in fact the most important variable. Post back with more details or questions and maybe i can help more.
BTW. a 6'' or 12'' pot is ample room depending on your veg time and feeding regiment. Like i said, post back with strain info and we'll figure it out.
Im likein the idea of droping the pot size in half and adding twice as many plants... this sounds good lol.. Ok this is from another post so it wont totally pertain to what we are talking about but here is what i am using mostly
Yes i plan on throwing in the UVB and CFL's in during flowering.. I also have a 50W All blue LED and 50W Triband LED i will use somewhere.. more likely in veg and clone chamber but not sure.. lets not worry about that .. sticking to flowering here
Lets see... As for fans i have two 170 CFM inline fans to blow through the air sealed/glass sealed 250W HPS Which will be a complete independent system from the exaust of the tent.. it will just blow right through the tent and be vented out of the room never mixing with the air in the tent * AWESOME *
As for the exaust fan its a The GrowBright 6" Inline Fan uses 110 watts and pushes 424 cfm of air, flange size 6". that will be paired up with the CAN 33 filter.. dunno how i will set that BIG BOY up.. 23 pounds and its like FREEKING HUGE.. had i known that i would have never got it.. i hate to think of hanging that thing up inside my tent and sucking airout ( best way) but i may have to do it reverse because that damn thing is HUGE..
For medium im gonna start with Fox farm Ocean forest in pots.. i have tons of different size pots and also 1 and 7 gallon grow bags.. i think thats what i got atleast..
I have Gen hydro liquid nutes that i could possibly use.. the 3 pack whatever they are i forget.. I also have Foxfarm 3 pack.. umm big bloom tiger bloom and grow big plus the three soluable additives open sesime chaching and ummm.. beasty bloomz i think? Yea anyway... I also have a TDS meter to check nute levels ( i think that will work) tools and well i cant think of anything else.. Is there any other peices of the puzzle your wondering about?
whats the best way to go about useing a 250Wer like this in this kind of space " 3'x3'... how many plants would fit max? Indica indoor kept pruned or condensed somehow.. i guess..
Oh yea Seeds.. Well i only have 2 of each of the following.. i figured 2 would be good incase i FUCK up and lose it ill have another shot to make that mother for clones.. I have .....
2 Barneys farm G13xHaze
2 Barneys farm Blueberry
2 The Church ( barneys farm?)
1 AK47x Low Rider
1 Pure gold (free)
1 Blue venom (free)