Enjoyed this Colorado website

Some very knowledgeable writers at: http://www.extension.colostate.edu/boulder/ag.shtml a Colorado University.
They seem very hands-on with their information.

An article on green tomatoes approaching fall season was interesting:
http://www.coopext.colostate.edu/4dmg/VegFruit/ripening.htm

One on passive solar hobby greenhouse, and had interesting information on usable temperature requirements.
http://www.cmg.colostate.edu/gardennotes/267.pdf
This one, of course, cries out for assistance from SolaRoof technology.