Right now I have a Chinese pepper bonsai tree that I bought last summer. It was doing fine all year, until now. To date, I've always kept my bonsai tree inside, in my room. I've done a bit of reading, and some people are saying that they leave their trees outside during the winter. The thing is, its getting to be as low as -20 C at night now, and I'm thinking if I put it outside, it will certainly freeze to death. It isn't looking great right now, so I'm beginning to worry. What should I be doing?