Frost proofing a greenhouse
I have a small lean-to greenhouse against the south facing wall of the brick house; it's probably 6 foot high, 8 foot wide and 2 foot deep.
I have ordered a small paraffin 'Parsene' heater, and I plan to overwinter more tender succulents, some aeoniums, some jade plants (crassula?). I will light the heater when frost's forecast.
Assuming we don't get a week or more of constant below minus C temperatures like that winter - was it 5 years ago?- do you think that'll be enough? It'll be a real faff to put bubble wrap up as additional insulation due to the design!