Depend's what sort of Stength your after, Strong Indica Couchlock or Trippy Heady Stuff Haze etc.
Most Indica's if left to finish properly eg: Afghani#1, Northern Lights, Big Bud. etc.
will take longer than 7-8 wks...Your looking at 8-9 weeks then drying time of course.
Also if your planning on growing from seed then all the plants will finish at slightly different times
as seed crops contain many different pheno's (Genetic Variances).
So..If you want them all to finish @ the same time and quickly then you should get some 'Big Bud' or
'Afghani'.
Grow say 10 seeds and two weeks into 12/12 select the best Female and take your cuttings.
These cut's will be exact clones of the parent plant and all finish exactly the same time.
Choose your Parent plant/Strain carefully...and remember you get what you pay for.
