Garden Gleanings, thank you for the question. Many people utilize an outside habitat for their worms. It is a good way to keep it low maintenance. You are correct that the worms basically will fend for themselves in extreme weather conditions. If it is chilly they ball up together, if it is hot they go deeper into the soil. Basically if you locate the site in a shady area, and provide enough moisture and food - they are your friends for life. Red wigglers, don't tend to have extended life expectancies in the yard, but I have spoken to people who have had them for years, so I think it is worth the try.
Please send any photos or ideas you can and we can try to avoid any unnecessary trial and error. There is a site you may want to review www.vermicomposters.com - lots of people there eager to share about - yes
Diane C. Morey
Making our environment,