2.5oz per plant??

I doubt it. You have a whole variety of factors working against you.

 

you can pull that off easy as long as you veg for a while..
this is my current grow.. its about a 2'x2' scrog and had to add an additional 150hps and angled both towards the center of the plant for full light coverage.. you have to keep them close and watch the heat. throw a strong fan blowing upward through the canopy to push the heat back away from the tops. and im also using 2 125w cfls(the big ones)
idk what its going to yield yet but they are very very dense buds and everywhere...

 

that is 1 lol

 

6 months.. it was my mother plant so she was chopped many many times and went through lots of stress this summer. it was really branchy but it wasnt a very big plant when i spread the branches for the scrog.


i bet you could veg for way less than 6 months to get that. shes about 8 months old now. i bet you could veg for 3 months of healthy growth and end up the same...or better

 

plants grow faster as they get bigger so the first month is pretty slow..the second is faster.. the third is much faster than the first, just from my experience. its do able but the longer you veg the faster it grows and the bigger the buds. its not too hard to get 2.5 oz from a single plant if your planning 6 weeks veg.. just lst. i like to let the plant stretch durring veg then once you hit the screen and lay the branches sideways you have gaps between the colas.

 

Space and light right off the bat. Dude you won't like what I'll
say about it , which is of course really not meant to offend , it's
unfortunate though that folks often ask the question and then
get upset when they don't hear what they wished to.

Suffice to say that what you have specified is unealistic under
your current conditions , in my opinion. But then that and a couple
bucks will get you a cup of coffee.

So anyway , a minor expansion of your space if possible along
with more light would make what you specify much more realistic
of an expectation , even the however reality is that it won't be with
every strain.

If you are stuck with the 2 x 2 footprint the you'll need more
height vertically , five foot to the lights would allow you a four foot
finish with decent lighting and make a couple of 2.5 to 3 foot bushes
a viable possibility. And your ventilation system might be adequate
now but you stick a 400 or 600 in there you'll need upgrades to control
heat and humidity.. Be forewarned , small spaces can build humidity
( or lose it but not so often) REAL quicklike at times.

By the time you get a decent light in there you've got enough
light to go 3x3 or 4 x 4 anyway , best advice I could give you
would be to do so if you have the space and can put something
together.

And stuff can be had relatively inexpensively that can be made to
work for a while , for instance if you have to have trays and can't
afford the good hydro trays then go look at a Home Depot or the l
like for the trays you set a washer into ( drain trays) , they aren't
deep enough for hydro but they make a quite adequate drain tray
for soil container , they're about 31 by 30 inches inside , the size
is oddball but it will get folks by for a while.

And if you want to cut your expense a bit as regards containers
'most every one of these warehouse type hardware stores has a
recycle drop in their garden dept for contractors and other folks to
drop pots , small seedling trays etc. , ask politely if you can look
through the stuff , they'll let you have it for nothing. Before you
dismiss this you might ruminate on something

2 15gal ,3 10gal , 16 7gal , 4 5gals , 7 3gals , 7 2gals ,15 square 1 gal
2 round 1.5s,7 square 1/2 gal ,39 hard plastic round 1 gal and no less
50 4 x 4s 6 deep.

That's one time when I hit the jackpot recently , do that a couple
of times and you'll have more than you can use. Just be sure to
wash them in anti-bacterial soap and bleach prior to using , rinse
well to remove any bleach residue.

Nutrients , if you're strapped for money , well even then STILL
avoid Miracle grow , see if you can get your hands on some
Jacks Classic , another alternative is to drop by a local Ag store
if there is one in the area , look for one that's oriented towards
*real* farmers and start reading the labels , you'll find that it's
not so hard to copy the nutrient profiles of the various hydro
nutrient peddlers.

Google Peters fertilisers. Note that they sell all the individual
salts too , more on that and why it can be advangeous if you
have an interest.

Apologies for being longwinded 'eh.

 

You can't afford a pH meter?
pH Test Indicator

Better than nothing, trust me.

 

Sorry Panda but I must disagree that he's got a prayer in hell of hitting
that on a single 150 , note that's not enough at the 50 watt a square foot
mark , and it doesn't remotely compare to your dual set up with cfls as
supplemental.

Rough math his setup 37.5 watts a square foot somewhere in the 15.5
-17k range for total lumen count for his rig, 75 watts a sq ft for your rig and 35k lumensthen add
250 watts o cfls with a lumen count somewhere in the 14k to maybe 16k
range.

Sorry , I'm really not trying to be a dick , but he's going to need more light
frankly there's a good case for his just copying your setup instead of buying a 400
( nice setup by the way) if he's stuck with the 2 x 2 footprint. If he can go
to a larger footprint more light would be required.

You've given me some backup with some of my theories on angular direction
of light as regards efficiency. I've got some spare gear laying around that I
got in a trade some time back , there are two 250 watt lights and a 400 along
with a sorta tattered but usable 3 x 6 tent and tray , that's right at that 50 watt
a square foot minimum , hang the 400 in the middle ,angle the 250s in off the end
and use 3500 or 4100 T5s for midline supplementals, figure probably another 500
to 600 watts there.

90-100 k lumens in hids and another 35k or better in supplemental for somewhere
in the neighborhood of 7k lumens a square foot which still doesn't match your 12k or
so per sq ft

Veg for 4 weeks and put 6 in that setup in 4s or 5s and it'll do those figures
though. I was just going to use the 250s for veg or supplementals and keep
the 400 for emergency spare ( light I don't have enough spares already , don't
become an equipment junkie) or sell it , but I may just experiment for a bit .

 

i agree also.. using 1 150hps alone will be good for veg and early flower as long as you have an even canopy and can keep the lights close... add another once you decide to let the tops come through the screen. once it hits about a foot of top growth you willllll need more light. the 150s are about 16k lumens.. at the bulb and drop at a certain rate depending on how far you keep them from the tops.. i keep mine at about 4" so it keeps the light intensity.

if you increase the distance of a 400w hps far enough you will be at the equivalent of having a 150 @ 4"... with a remote ballast you can get the higher wattage bulb closer.. ive seen some stupid shit before with a 400w hps lamp about 3-5 ft from the plants then bitch about someone having a 150w saying they need to upgrade..

watts mean nothing...its the lumens(light intensity) on the plants surface. if he were to put 4 50w cfls in his tent...it isnt going to do better than a single 150hps..so throw that rule right out

 

You know you can get a Ph tester at any pet store. They are cheap as fuck.

That 150 watt CFL, was that 1 bulb or multiple bulbs that added up to 150?

 

With Proper Training and Veg. Time, yes you can. As far as PH Meter, I bought mine from Ebay for $8.99 including shipping (YellowOne) and has been working for the past 6 months with no trouble.

Right now I'm pulling almost 12 ounces Dry from a 400 watts every two months with 4 plants.

Like Pablo Picasso said "If you can dream it, it can be possible"