Im a beginner worm lady (or crazy as my other half says) and wonder when I should bring my worms in the house. I live in the "frozen north" (as he calls it) with widely variable winter temps. Apparently, he spent WAY too much money in the garage this summer, as he made rubbermaid bins and has agreed to worms living in the basement for the winter. My question is when do I bring them in, or how cold is too cold?