Jonathan Bates of Holyoke, Massachusetts has a nifty greenhouse he calls his “backyard bioshelter.” He uses it to grows veggies year round in a climate that often goes well below 0°F. An aquaponics setup and a worm bin are also integrated into the shelter. And he’s even trying to grow avocados!
You can keep up with what he’s doing on his blog at permaculturegreenhouse.com.
Thanks to the Natural Building Blog for the link.