Like you, other than some "baby orchids", jade/aloe vera, and rooting plumeria cuttings, by greenhouses are emptied in the spring and will remain empty until the fall. My greenhouses do get some shading from large oak trees that are east and south of the greenhouses and those oak trees are still pretty much fully leafed. The free-standing GH probably only gets about 4 hrs. of sun and the other greenhouse is a lean-to and gets full shading (in the fall/winter) from 2:00 PM on. the Perhaps the trees/house shading is the reason my GH's don't get as hot in the fall and winter months. Heck, they will get 110 F in the summer with fans going and door/vents fully open.
