Mainly for the new gardener.
It will soon be time to consider more active use of the cold frame. What is its purpose?, how important is it in the cultivation of garden plants?.
http://mysite.freeserve.com/prop1/cf/thecoldframe.htm
Probably the most thorough thing I've read.
BUT - as I said earlier, it gets to be something of a lottery when you have only one frame and, say, half a dozen subjects, all going out at different times? = Tim