Attempt at Water Only BuildASoil

EDIT: This is not an Autoflower, im not sure where the confusion came from.

Having a bigger pot CAN absolutely trigger a later flowering period. Ive had it happen myself but there are a lot of variables (taproot depth, temp, light, genetics). What I will say is normally you hit 4 weeks and it flips almost like clockwork, so do not bet on the larger pot theory as its not consistent. I only top once and thats how I prefer to do it. Two tops would likely stunt them too much and cut your yeilds.

Hold on brotha, having a bigger pot won't extend your veg period with an autoflower, this bitch will flower withing 2 to 4 weeks regardless of what you do (unless you just kill em but that dont count), so taking this into consideration, top it only 1 time and count the ammount of side branches (dont count the fan leaves just the branch above them), each of those branches will be shooting right up there next to the main 2 tops, these side shoots are just like tops in some strains, but in others they may not develop as much as the other 2 who will start acting as new tops. Check my LP1, pictures are not easy to take in my space atm but you may be able to notice the difference between the LP2 and the LP1, LP1 was topped once, LP2 wasn't, result is 1 big bud in the LP2 with some side buds, results for the LP1 is about 10 tops. Good luck growmie, since ur growing autos if u need anything just let me know, i gladly donate my time to solve other people's issues when i can, but i don't know everything so i can't help out with everything, but if u got any issue i might hold the answer. Stay lit growmie.