Building a passive solar greenhouse

The chard outside in the garden is frozen and wilted. I hear it will perk right back up, but as of the moment, it's lookin' pretty sad.

What would be better this time of year than a nice, passive-solar greenhouse out in the garden. Here is a great link from the Bradford Research and Extension Center, University of Missouri, showing plans and instructions and design concepts for a very straightforward passive solar greenhouse.

An illustration with the basic concepts [click picture for a better view]:



The solar gain off of those water barrels is amazing.

So, for the serious geeks out there, here is the page with the construction details and materials list.

Enjoy dreams of season extension in the garden,

Bp