Looking for large greenhouse ideas- for heavy snow
I'm hoping for some guidance from anyone that can recommend a high tunnel/ greenhouse that can withstand significant heavy snowfall and wind. I want to grow veggies right in the ground..
I spent last winter researching what sort of greenhouse to get- I'm looking for 'aprox' 20' x 30', more or less. I wanted to get it in this fall but it didn't happen- so spring 2013 it is!!
What I really want is to get food growing in Feb/March and extend summer into December if possible (without electricity).
I've mainly been looking at steel tube with poly- seems two layer of poly with a small fan (solar is feasible) can really work great.
Have looked at Slip Tube, Paul Boers, and even Growing Spaces geodesic domes (nice but likely too expensive for me plus a huge project to build).
I see all the reasonably cheap polycarbonate type GH's, you can double the length. But it sounds like windows pop out, leak (or lose heat through roof) etc etc.
Any ideas appreciated!