When the temps start getting down to the low 40's you can put it somewhere where it won't freeze. A basement, unheated garage. If you're growing them inside don't, these are not indoor plants.

Mine go in zip lock bags then into the bottom of the fridge.

Trying to force a VFT to grow during the winter after it's queued it's time to go into dormancy will kill the plant if not weaken the plant that it later dies.

Hi
i live in s. florida so reverse cycled VFT by growing from seed in the winter. Then put them in thfridge during summer . Wife decided the crisper should contain salad stuff not VFT so just grew them from seed for as long as possible Don't keep them anymore but as I recall had some last 18 months !! gary