when do u start counting down the weeks for flowering?

When u switch to 12/12 or when u 100% know its a female?

Some start from the day they flip.

I mean i flipped my baby girl around Oct 10 2013 but she didnt show Sex for like 2 weeks almost so idk where my plant would be right now. Im assuming something like 7 weeks into flowering right?

Most go from switch
I go by flower formation...I could very well be wrong
If its mature at flip it should start to flower immediately(Sativas take longer) and that may instigate part of the confusion as an immature plant say 12/12 from seed is not flowering just because its on 12/12
And this throws breeder times
Likewise many landrace Sativas that originated having 12/12 nearly year round are loosely auto flowering..then there are ruderalis strains that seem to flower from birth...

In each of these cases the actual flowering time after formation of bud doesn't change....the 12/12 from seed "flowers" in accordance with breeder times as does the same plant flowered after maturity...so I go by flower formation.................

thanks again.

The scientific answer is the day you switch the lighting schedule. The first week is usually the transition, but it's still considered flowering.

IMO- it's good to write the flower date on some duct tape, and tape it to the container.
Later on in 5-10 days write the date she switched, you'll be able to tell. she will start growing buds.
The flower time gets you in the Ball-Park, you need a pocket Microscope when she gets close, Look, and go by what the Trichromes tell you.

Good Luck on Your Grow

OK... Growing outside... there is no switch to throw, so you count from the day you first see flowers....
Now I started to grow outside so I always still count from the day I see flowers... about 5-8 days into bud...
When an estimate of flower time is given it is estimated in perfect conditions, from when you will see flowers until plant is done, that is why most estimates from growers are shorter than can be realized in actual conditions...
Your time/days may vary...

flip the lights, start counting, post pics on website.....two more weeks, two more weeks, it's always two more weeks

I love gardening. Tomatoes, peppers, eggplant, and lots of different kinds of flowers. And one thing I can say is nothing is written in stone when it comes to ripening. We're talking plants here, not robots. I've had the plants from the same seeds ripen two weeks apart. The only answer is like a tomato. Eat it a day or two before it's ready, and it's still ok. Let it go soft, and yuck. So get a scope and check them, and forget the calendar. And if you get to much time into them, that excessive amber is just like an overripe tomato. I like my tomatoes juicy, not mushy or green, even if Burpee says those beefsteak swill take 75 days

Sand4x105, I grew for many years outside before a Army Blackhawk circled me like 10 times from their min 450 foot safe flight altitude and I almost turded my pants. I tried a longer flowering variety, and it was still green when every other leaf changed, but guess they didn't want the bad press from spending ten's of thousands o $$$ to get one plant. Anyway, growing the same inside as out, I found outside takes about 2 more weeks. I write it off to the fact they flower around the 2-3rd week of July, and the day light is a little longer than the 12 hours used to force flower even after the solstice on, then slowly shortens. At least now I don't deal with those f#$k&!g bud worms and the rot they cause. just my opinion.