Growing outdoors must be such an adventure.
I guess best is to enjoy it.
Let it do her thing. Don't know if you're feeding with waterings or just prepared the soil before and now just water but she'll give you signs of that she's craving and you can read that to know if it's entering flowering or not.
For example in pre flower she uses a lot of N-K not so much P. That yellowing on the upper leaves suggests it's craving magnesium. This could be related to her depleting the K-P from soil.
I would say she's entering pre flowering but you can be sure if you see her stretching a lot.