Hello everyone :)
I am the owner of a 2,5 m x 3 m x 2,5 m (height) greenhouse, covered with PVC panels. I would like to heat it at about 13°C or 15°C during the Winter in order to grow a larger variety of plants, especially highland Nepenthes and Heliamphora, but I fear it would be extremely expensive. I live in Northern Italy and temperatures in Winter can be as low as -5°C... electricity is definitely unaffordable here I think, so I was thinking about using a small pellet stove... do you have idea?