2 outdoor: 1 flowering 1 not

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