Planted Tank Guru
Join Date: Sep 2004
Location: Garden City, KS
Just my opinion, but I think you might be better off building a simple hoophouse. I think that no matter what you do to insulate your shed, you will end up needing to put an air conditioner in there for your summer months. Unless the shed is under an old growth forest or something? For instance, I have a shed in the backyard of a family member's house that I use as a workshop, and it has been insulated. And because it is under a bunch of old oak trees, it never climbs much above 90 degrees when I have the door open in the middle of summer.
But a hoophouse isn't really enclosed, per se, so a hoophouse would pretty much remain close to whatever the ambient temperatures are in your area at all times.
I just think that you might end up saving time and money if you build a simple PVC hoophouse and cover it with clear plastic.