Mike, thanks so much for using the word "walipini". It was new to me, but when I Googled it I got a page which for starters shows an old fashioned pit greenhouse. This is exactly what I'm getting ready to build here (I've already bought the Plexiglas panels). I've had amazing (to me, anyway) results using a carefully sited traditional cold frame. A pit house should make lots of other things possible. Jim McKenney _______________________________________________ pbs mailing list pbs@lists.pacificbulbsociety.net http://lists.pacificbulbsociety.net/cgi-bin/…