i have plants that r well into flowering, they smelled so good an then i went away for 3 weeks when i came back they look more better but the smell has dissapeared :s anyone kno why? and does this mean that its weak?
There are strains that have very low odor and pack a punch. The aroma is really dictated by the strain. Those characteristics are bred into it. B. Grunt told me his Papaya smells like Fresh cut Pumpkins. I wouldn't take aroma as a sign of potency. Skunk you can smell clear across the house in flower. Yet NL I barely smell. Still both great strains.
Grow it out. It'll be good bud. IMO
The reason for the lack of aroma, could be down to the fact that many strains will go through possibly 1, 2, or even 3 PHASES.
The PHASES are when the pistels (hairs) appear to die, from the bottom - up.
In theory, the plant has prematurely matured, having swollen the bud and produced some crystals.
Depending at what point in this process the plant is in, can make a big difference in aroma.
I've had it, where they seemed to smell every other day!!!
All I can say is that different strains, behave in different ways - you may find it helpfull to look into more information regarding your particular strain.
Good luck... and don't worry, as long as they look healthy,... your doing alright!