So i can't decide where i want to permanently place a 50' greenhouse in my backyard. We grow year round in a 30' natural gas heated mist cooled aeroponics light dep self designed Solexx covered hoop structure currently, but it's not optimally oriented or designed for year round growing. Mostly because it runs North to South on the dark green patch (astroturf) in the below image. I had my reasons for placing it there to begin with, like the gravel bed under the nice to walk on fake grass, but you live and you learn.
Note in the first image link below there is a ground cellar entrance at the start of the 57' line. Concrete steps go down about 15' to a shipping container buried underground, the back of which ends just before the line ends at the wall. I live in Zone 9. Summer is hot, the ground cellar being tempered i could use it like an earth battery. Covering the ground over the buried shipping container i assume would only help keep it cool it down there.
Downside is the trees that cast a shadow during fall and winter. The above image was probably taken in March or September. You can see the wall and tree shadow creeping South. It's possible to build over the ground cellar while avoiding the wall shadow, but not the shadow of the palm trees.
This is a shot looking South at the trees. http://imgur.com/a/nZyih
That's just a ground cellar entrance cover to keep dust out, not an operational greenhouse, but it's right where the line in drawn in the above image, and where im thinking if building a 50 footer.
Is incorporating the ground cellar worth the added shade? Or should I head North in my backyard about 50' to avoid shade and forgo the greenhouse bomb shelter combo?