Cheryl, If you have an emergency light--a lamp with a little steel cage with a long cord that is used in repair shops, etc.--hang it in the mobile greenhouse with a 100 watt bulb in it. That's how I'm keeping my plants in the potting shed warm enough during this cold snap. You stay warm, too!
I was thinking of something along those lines, too. And they're even predicting snow here on Friday! Maybe I'll just wish it up to Toni? :-D
