Really depends...
What strain?
How much vegetation time?
Indoor lighting? (what type? how many watts)
Grow medium? (soil/hydro/aero)
Grow method? (LST/Supercropping/topping/scrog/sog/etc...).
Nutrients used?
If you're looking for a combo that will yield a lot, it would be better to look at the individual factors and weigh it against what you're looking for. If you're looking for what is going to yield the most, yield per harvest is more telling than yield per plant. I haven't grown yet (waiting to get my MMJ paperwork through), but if you're just interested in what would yield the most, here's a sample setup:
- Aeroponic system (most efficient delivery of nutrients to the roots, which equates to the fastest growing plants).
- Lots of light! (depends on your grow space, but figure 50-70 watts per square foot. biggest factor in yield if all other factors are equal.)
- SoG (if you have the space, etc, IMO the most efficient use of real estate and time for yield).
- NL #5 seeds (depends on the grow method. NL#5 is a potent high, big yield, and is said to work very well in a SoG set up).
*All of these methods have their pros and cons. I don't have an answer for my yield per plant, but hopefully this addresses what information you were really after...
I'm planning a 36 site aeroponic SoG, so this advice is biased based on the conclusions I've come to...but I'll let you know in ~6 months what my dried yield per plant was
.