Last year I had three plants that I did on the windowsill. They started flowering on their own at the end of January even while getting supplemental lighting for a total of 14-15 hours per day. Once I saw that, I yanked the light and they stayed in flower right until I chopped them on May 1. Never went into reveg even though they were flowering as daylight increased, no hermie issues,* they just kept flowering.
I’m following the same path this year, although they started flowering about a month after last year’s plants did so we will see if that becomes an issue.
* I’m on IC as well, and over on the landrace thread there are all these folks with ten or twenty times my experience, using all these esoteric techniques and feed formulas and what have you - and quite a few of them complain of gender issues or weird growth. I’m really becoming convinced that when it comes to weed, doing less is more.