I have a bit of a dilema as I have seedlings in the greenhouse (glass) and our weather has taken a turn for the worse (snow) here in Brittany. I've bubblewrapped the stands that the seedlings are on and have kept a large chunky candle burning day and night. What I really want to know is whether I should stick to using candles to help keep the greenhouse frost free or whether I should invest in a paraffin heater (bearing in mind that paraffin in this country isn't cheap). I've researched about paraffin heaters and read other peoples reviews and quite alot of them are negative - soot deposits and smoke being the main problem. Not sure what to do and I really want to give the seedlings a good chance of survival.