Going green in Indiana

Hello,
       My wife wants to grow year round in zone 5b. Im in the planning stages of 2 greenhouses.The first one is pretty straight forward defuzed tempered glass roof with twin wall poly sides already have materials purchased.
    The second greenhouse alot more complicated the winter greenhouse.I have a monosloped solar shed that faces south with no walls (just legs)9 ft tall.The legs are 6x6 @ 7 ft appart .I wanted frame it in and put glazing on the outside of the 6x6 and put r12 insulated garage doors on the inside of the 6x6. Would the transparency of glass be better than poly since the garge doors are to be my insulation?If i put the glazing at 90degrees the garage doors will work but dont know if they will with the glazing angled at the suggested 40 degrees latitude plus 15degrees so 55 also that will incroach on the county easement.

Hi Kenneth, welcome to Permies!  Did you know we have a whole sub forum for greenhouses?  Here's a Link

Would the garage doors be functioning?  So they close down at night to insulate and open up during the day?  If so, that's a cool idea.  I think they could handle any angle you put the track at so you could have a sloped south wall as long as the doors were tall enough to cover the whole expanse.

With movable insulation (on the inside of the greenhouse with a gap between it and the glazing), the challenge is keeping it relatively sealed around the perimeter and between sections.  If you cover 80% of the glazing it's as bad as not covering any at all since the air will just travel between the cold night glazing and the insulation and it will churn cold air into the greenhouse.

Or did I totally misunderstand and you're just using the garage doors as your walls?

Edited to fix the link...

Thanks Mike, I will repost in greenhouse forum.The garage doors will open and close by using garage door openers controled via thermostat between glazing and door.All of the glazing will be sealed off from rest of greenhouse when doors are down.Kinda like putting plexiglass sealed to the outside of your garage.
Since i doentneed the insulation factor of twin or triple wall poly would glass be better as the glazing hence more light transmission?

I'm not sure about the glazing, that's a good question.  I think it's a balance between the true light and thermal radiation transmissivity of the glass vs the plastic and the cost.  When the doors are "up" you still have to fight the heat loss to the outside.  But I don't really know which would be better...