Outdoor Ruderalis (photoperiod)

Since you are growing outside and need to keep them short, topping them or training (best option with autos) would both work to keep them below fence height, but I would advise against defoliating, especially during flowering, as this is exactly when they need maximum energy to grow their biggest and best flowers. Just remember, - Less leaves = less energy being made = less flower growth. Actually, snce they are autos, you shouldn't have any problems keeping them below fence height, they rarely grow that tall outdoors, so I would be inclined to just let them do their thing with minimal interference. Hope this helps, Organoman.

Genetics are huge on flower trigger.. some varieties will trigger with 10 hours of darkness.. some need the full 12 I’ve seen research from Utah state on this.. it’s a spectrum. That said.. Depends where you are at - but I am a bit surprised you still have one not flowering. For example, I had one trigger around first of august, one around mid august and some around late august.. All same set up essentially but diff genetics