So I can flower before but the quality is going to lack, so im better off growing a mother out to sexual maturity and then letting the clones veg for a couple of weeks, then i should have some real potent bud, is this right?>
You can certainly flower before the plant reaches sexual maturity and a lot of people do indeed do exactly that, but in my opinion the plant is not being grown to 'it's fullest genetic potential' when flowered before sexual maturity is reached.
Growing out a mother plant and taking clones from it is a popular way of growing for many people for several reasons -
1) Clones take on the sex of the original plant, so if the mothers female so will the clone be in all probability.
2) The clone takes on the age of the mother plant. So a clone taken from an 8 week old plant automatically becomes 8 weeks old at the time the clone is taken.
3) There's an unlimited supply of clones that can be taken from a mother plant and therefore no need to keep buying seeds.
Because clones take the age of the mother plant, vegging them till sexual maturity is reached is unneccessary and they can be put into flower pretty much as soon as they're rooted. This is a useful technique with plants that grow tall like Sativa and Sativa hybrids because it helps to keep the height of the plant down and is particulary good for use in SOG growing.
Its strength can also be it's weakness though and Indica dominant plants which stay fairly short anyway would probably need a longer vegging time if not being grown SOG style because their height doesn't increase much in flowering and therefore the smaller the plant is when it's put into flowering the smaller the eventual yield would be.