Greenhouse Growing

I have a 6 X 5 greenhouse, and live in NJ. What is the cost difference? I'm keeping the temp at 55 at night and 70-80 during the day. Would it be worth it for me to get a gas heater if I use it just for spring planting? How much of a difference in electric bill w/ heater kept at low?

Locally, natural gas is considerably less expensive than electric heat so I'd say yes, a gas heater would be the best way to go but our local natural gas prices will probably increase as energy costs increase so I'd suggest checking with your local gas company and your electrical company to compare those prices.