I have a 20x12 ft polytunnel. I am interested to heat this, particularly the front 14 feet. I've been looking on the internet for quite a long time on this topic, but can't find anything as to how much this could cost.
My aim would be to keep the tomatoes, peppers and cucumbers producing for as long as possible.
SO, may I ask, who here heats their tunnel? What are the particulars of your setup? And, how much does it cost?