early sexing- preflowers

i was wondering when the earliest preflowers usually emerge? and how long after that do i have to seperate male and females so no pollination occurs. also, is keeping the plants in a large pot outdoors result in less of a yield than if the plant is in the earth? will post pictures to show all of my first time experience. i am loving this!

usually they start around 6 weeks some strains take less or more, but you should have some time, the males will pretty much autoflower, and the females will wait till the daylight hours significantly shorten. after sexing you should have 2-4 weeks to kill males. if the pot is big enough it shoudn't reduce yield, figure a gallon per foot of plant, in ground has the possibility to yield much bigger plants in the right climate, unless you have some huge ass buckets. glad your having a good time, good luck bud!