I have two different types of Brunfelsia. Both in containers. I find they only bloom one time a year and not for a long period.
I don't know if they are considered toxic. I have always had both cats and dogs who show no interest in these plants.
Initially, I was overwintering them in the greenhouse but no longer do. The winter freezes prune them back. Our temps will on occasion dip that cold but only for a short time. If you see those temperatures for an extended time, I would think the roots might be damaged in a container.
Hoping you enjoy them. I think the blooms are beautiful and smell wonderful.