Question about duration of flowering

If I am growing a plant with a ten week flowering period, from what point does that start? Is it right when I flip to 12/12? When the pistils start showing? Just trying to get an approximation of when harvest will be for planning purposes. Thanks!

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Ten weeks from the first sign of pistils at the tops, give or take a week or 2. Breeders claims of time to maturity are general guidelines and assume proper environment.

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@MidwestGuy has you covered here.
You can expect a week or two longer than the stated time on most grows. I had one ready at 9 weeks but its very rare.

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I like to start counting day 1 when I see the plant starting to flower and show pistols. I also keep the veg nutes going for another week or so to support the stretch. Good luck

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Thanks everyone for the info. Very helpful!

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And a reminder that flowering times are approximate. Sometimes, very approximate lol.

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