I think the greatest variable will be how long you veg and the final size of container. I've gone 12/12 after 2-3 weeks veg. I got 20-30g per plant in 1/2-gal containers. When I go 6 weeks veg I get 150 to 240g from plants in 2.5-gal containers (#3 containers). The ones with shorter veg times finished faster. So, it's a tradeoff between smaller yields more often.
Next will be the intensity of the light. I get 0.9 to 1.3 grams per watt. The more watts, the more grams per square foot. (To a limit. You start having diminishing returns at some point. For the LEDs I use, 30-35w/sq ft is ideal. 40 would be getting into diminishing returns. T5HO is 40w/sq ft, with 50 getting into diminishing returns.
Try the "useless" schedule. It worked well. It's right at the limit of what the plants can take. It's tedious mixing all those ratios through the grow.
If you followed the GH Flora label, this is what you'd feed:
GH label (full strength):
--------------- R A T I O S
---------------- N-P-K ---------- K-Mg-Ca ------- PPM
Seedlings -- 1.21-1.00-1.82 -- 5.48-1.00-2.67 --- 164
Mild veg --- 1.21-1.00-1.82 -- 5.48-1.00-2.67 --- 656
Aggr veg --- 2.07-1.00-2.98 -- 7.98-1.00-3.57 --- 1203
Transition - 1.21-1.00-1.82 -- 5.48-1.00-2.67 --- 1313
Flower ----- 1.00-1.28-1.59 -- 4.00-1.00-2.12 --- 1423
The ppms are too high, so you'd cut the label's dose in half. But, that gives you an idea of what GH recommends.
If you use the "useless" schedule[1]:
--------------- R A T I O S
-------- N-P-K ----------- K-Mg-Ca -------- PPM
VEG
week-1 1.32-1.00-2.41 -- 6.76-1.00-2.15 --- 418
week-2 1.85-1.00-3.06 -- 8.08-1.00-2.82 --- 721
week-3 2.06-1.00-3.31 -- 8.54-1.00-3.07 --- 830 [2]
BLOOM
week-1 1.00-1.29-1.88 -- 4.54-1.00-1.77 --- 1020
week-2 1.00-1.47-1.70 -- 3.75-1.00-1.90 --- 1065
week-3 1.00-1.52-1.71 -- 3.65-1.00-1.88 --- 1218
week-4 1.00-1.72-1.87 -- 3.53-1.00-1.66 --- 1334
week-5 1.00-2.21-2.25 -- 3.33-1.00-1.31 --- 1395 [3]
week-6 1.00-2.70-2.36 -- 2.91-1.00-1.23 --- 1421
week-7 1.00-3.16-2.72 -- 2.88-1.00-1.05 --- 1384
That's the results using the unmodified schedule. However, I added GH liquid Koolbloom (LKB) during flower, and powdered Koolbloom (PKB) the final week (prior to 10 days of water only). The following is how it turned out:
week-2 1.00-1.92-2.16 -- 4.75-1.00-1.90 -- 1275 [4]
week-3 1.00-2.12-2.31 -- 4.95-1.00-1.88 -- 1534 [5]
week-4 1.00-2.53-2.68 -- 5.07-1.00-1.66 -- 1755 [6]
week-5 1.00-4.09-3.34 -- 5.07-1.00-1.22 -- 1165 [7]
[1] Useless schedule:
http://forum.growkind.com/showthread.php?t=35174#.UmIsPhDK7Kc
[2] Repeat until bloom.
[3] Cut dose in half if using bloom booster.
[4] 2ml/gal LKB
[5] 3ml/gal LKB
[6] 4ml/gal LKB
[7] Cut base nutes in half, as described in the Useless schedule. Use 1.25g/gal PKB.
I got those numbers from the spreadsheet mentioned in the GrowMore thread linked to in a previous post. You can use that spreadsheet to see what you're doing and compare to those numbers. For example, if you add calmag that has N, your NPK ratios would be different.
I think all that stuff is too expensive. You can get those ratios with anything, like inexpensive Jack's Classic. But, you should do ok if you follow the above.