Funny how one idea can morph into another. I thought about the fridge as I have an old one too. But I came to the conclusion that it just wouldn't work. Went to the clearance section at Menards and bought some wood and a saw and went to work to build my box. I think it cost me a total of about $150 to build the entire thing and that was including the $40 saw. It's twice as big as one you can buy for that. So maybe you should just try to do that. You plants do look healthy, Keep it up!