I prescribe to the concept that one should let the heat in the greenhouse
increase only by solar gain. If you raise the temperature on gray, cloudy
days, you will likely end up with leggy plants that aren't very sturdy, as
they try to grow - stimulated by the heat - without the ability to conduct
much photosynthesis.

Set you preferred minimum nighttime temp and let nature take its course.
--

Ray Barkalow - First Rays Orchids - www.firstrays.com
Plants, Supplies, Books, Artwork, and Lots of Free Info!
..
"kenty ;-)" wrote in message
news:1096803384.9kaoQ80nf6crr+oLz+bazg@teranews...
Hi Everyone,With autumn/winter upon us,my first growing in the greenhouse
I
have a question about how you control temp with the day or just a set
amount
of temp(8 hours a day, for example) regardless of daylong.
--
Thanks Keith,England,UK.