I can tell you for sure, that FLOWERING for 6 weeks is not enough. Especially if they ae INDICA, and by FLOWERING, I mean counting time from the start of 12/12.
From the first day of 12/12, you need to mark the calender and wait 8 weeks. Do not go by the date or period of time, it is just a clue or a sign as to when to be ready to harvest. Around the 8th week, the white hairs (stigmas) should be changing to red or reddish brown, if they ahve been getting proper lights and lumens. That's another sign or clue. The real determining factor is the color the the trichomes, that you observe thru a
$9.95 RADIO SHACK battery lighted microscope.
Go to GROWFAQ and read up on HARVESTING.