I have 6 small, 2 year old spruce transplants in 5" plastic pots and a juniper bush in a 10" pot. The ground is now frozen where I live in upstate NY. I did not get a chance to plant them and wondering how do I care for them over the winter. I do not have an attached garage or a breezeway which keeps temps cool but not freezing. I can put in basement but there's no light really. Any ideas?