Nice progress. Look how much they've grown since September 3rd! I just scrolled back up to the earlier pics.
and most of the rest just started the past couple of days. With 1 gallon pots I thought they all were gonna be screwed from the early light stress but maybe that early stress delayed everything? A couple of the plants have 2-3in long roots sticking out the bottom of the pots into the tray. Definitely doesn't seem like the roots hitting the bottom of the containers triggers flower, which is a theory...