I get sooooo weary about yield posts. Sure, we want to get as much as possible out of each grow, but quantity is no where near as important as the quality. Quantity says to me you want to sell, quality says you have medical need.

But, to answer your question. Yield all relates to the size of a given plant when it goes to flower. (I am afraid this is going to be a long response) This has to be broken down into indica doms and sativa doms as the growth spurt in the flower phase is markedly different between the two.

An indica will stretch much less, for example a 2 foot indica going into the flower room will stretch about another foot. Conversely, a 2 foot sativa (all in same size pots) will stretch 3-4 feet without topping or controlling. Yet, both plants will have about the same yield in weight.

So, the factors that involve yield are more related to what gets put in the flower room, how large the pot is, and to some lesser extent the genetics. The grower has more control over the yield than the genetics, as a not so good plant will not be cloned and continued on.

What you really need to look at is why you use the cannabis and for which effects.

Please, don't be offended, but it sounds more like you are a dealer in the making than a patient, which is what this site is about....(and any other person only questioning yield). Maybe there are other ways to phrase your questions?