On Jan 31, 2:27*pm, Zootal wrote:
I'm considering putting together some cold frames to get an early start on
some cabbages, brocolli, etc. this year. Does anyone have any practical
advice they would like to share? How to build them, where to put them, what
not to do, etc.?

Key is having some kind of temperature control device - so that when
the sun comes out you don't fry things.
There are some reasonably priced devices that are designed to open
vents that require no electricity - they
work on heat energy.

Hard to make other recommendations as you haven't said anything about
size, where you are located, or
other details.

Good luck!