Sorry if this has already been said, but I couldnt be bothered reading through 20 pages of flaming.
I see a lot of growers on RIU growing weed from seed, some then being disappointed with the results. I would have thought that it was common practice amongst growers but perhaps it is not so here is my grow tip.
Buy fem seeds and veg them all to about 1.5 feet. From there you should be able to see the ones that are struggling and the ones that are veracious. Take 1 clone from each noting which plant they come from then switch to flower.
Veg each clone into a mother while the parents are in bud.
At the end of your budding, note the one that gave you the most bud, if youre lucky there might be two of them. Some will struggle with budding, fan leaves will die early etc, they might stretch, or stunt, youre looking for the best of what you have.
Then after noting which gave you the best results, mark the clone of that one as your permanent mother or take a room full of clones from that mother and switch it with the rest, continuing only with that line of plants and budding out the rest to be never used again. It will give you the same results every harvest.
Getting your genetics right is half the battle for big bud. The first plants I had were from a clone from Afghanica No.1 strain that had been floating around here for ages. It had been cloned and recloned a zillion times before I received a clone of it, but because it had good genes it just kept popping big bud.
This is one way, no doubt others have other ways of doing the same thing.