My growing experience is mainly with autoflowers a...

Thats the nice thing on photoperiods, you can do as you like it. I switch to 12/12 if iam ok with the shape with my Plant. That means if iam ready with topping and supercropping, when she is well prepared for flowering. if you dont want to do any training, you can flip anytime. some Big growing companies go with 3 branches and let them 4 weeks in vegetation. What are your plans=? LST/ Topping=? -Thats the nice thing you can try very much things, and you just can let her grow until you are statisfied with the Pants shape

Hi brother! to anwser your question, yes most photoperoid plants are not written in the catalogs like autoflowers are... in photoperoids its usally flowering time that is (shown/written) and in autoflowrers i am sure that its from seed to harvest weeks, BUT ! there is always a "but 😂" if u want your buds to mature and be a bit bigger and stronger hitting, let them sit for another week or two everything depends on you! more time more power more weed! Happy Growing :)