Heating a greenhouse - Yes or No?

[Cadalot]

OK I don't heat mine BUT my Terracotta pot and candles are used as Frost prevention so I voted candle.

[ESBkevin]

Unheated. No power available and I've given up faffing with parafin in the past. Since we now have a spare room we have a temporary grow room with a heated prop and simple grow lights. But things have started migrating to the greenhouse now (another really cold snap on the way though).
Inside the glass greenhouse is a plastic blowaway that serves as extra insulation and racking for the tender plants. Other plants are now on the regular racks, the weekend may see me panic on that score though!

[Baldy]

I'm fully unheated at home, the one on the plot has bubble wrap, but that is largely to try to plug the holes caused by lack of right angles and straight lines in it's 'construction' - so I'm sticking with unheated...

[AmateurOne]

Unheated, but using an electric fan heater??

Surly that is heating, even if it is only part time.

Guilty as charged

[Baldy]

Don't call me surly
https://m.youtube.com/watch?v=ixljWVyPby0