Would love to crop her in 3 weeks, want to get her...

Build a small shelter with clear sheeting over the top give you better chance of making finish line ...I had same problem check my diary bro hope this helps

Keep her out for as long as you can and coverage from any rain would be recommended too! I’m in Canada and our growing season is very similar to yours in the UK. If u keep her dry, she might make it before any frost/bud rot forces u to harvest. Buy a cheap used microscope or jewellers loupe and check her trichomes. That will take all the guess work out of it and allow you to harvest her when u see your desired ripeness. If it frosts, she might make it thru one maybe two but if she gets the rot/mold- harvest her immediately. Better to have some quality bud than nothing right? Hope the weather holds for all of us northern climate growers and cover that little lady up- she looks great but not ready yet! Cheers!

It will depend on how she looks by trichomes. But if she needs more then u can build a little greenhouse with pvc or wood around plant and put some heavy duty plastic around if the temps get to freezing. If not just cut her and take losses

I would personally say you have at least three weeks left, maybe 4 or 5. Best thing to do is not rush it, you will be disappointed. Do you have a light inside or greenhouse you can move it to if it gets frosty. But a mild change in weather towards the end of flowering can also be beneficial to trichome production 🌱😊

Ro not hate yourself you should check the trichomes ratio before you harvest and the best way is with a 40x magnifier, like that you will be able to know if the effect will be an energetic high ( clear trichs ) a deep stone ( amber trichs ) or a 50/50 effect (50 % clear 50%amber ). NOW from what I can see on the pics and thanks to my own experience I can tell that if you harvest now you are about to hate yourself !! 2 more weeks at least for me ( even 3 )