Growth will stop completely in a few weeks. I stop feeding August 1st. Most of my figs will be protected from freezes and slowly hardened off. Mostly due to the Great Lakes. Winter is very slow here. Kept away by the lakes. All went very well last year.
I have five in ground figs, and all in different micro-climates. If they all die, no big deal, just extra plants. Trying to learn more. I have to keep it interesting. My main collection will be protected, and ready. Now my southern high blueberries, well I'm still trying to figure them out. I lost one last winter. Hoping I fixed the problem. All others were hurt, but lived.
I know though that figs can survive here, one member here has in ground figs. He lives a few miles away. All I'm hoping for with this fast growth is to create a large root system to make it through zone 5b, without protection. I'm not even going to try and save any growth above ground. I could, and may in other years to learn more. Let's start with the nukes though!