dwarf evergreens for attic-level deck in zone 6a
We recently purchased a new house, and are hoping to put some potted evergreens on the attic-level deck.
I suspect that we want dwarf trees, simply because we will need to keep them in pots. We would prefer to be able to leave them out all winter in zone 6a. However, we are near - but not at - the top of a hill, and the deck is two stories up. So there's a fair bit of wind.
The deck gets a lot of sun in the afternoons, and possibly late mornings as well. The deck is behind my office, so the rest of the 3rd floor on one side, and has a small amount of shelter but not light-blocking on the other side. I get a lot of light in my office through the glass sliding doors in the afternoons, which is why I know it gets a lot of light out there then. I suspect - but cannot recall - that there's also light earlier in the day, it's just not getting into my office.
We're also hoping to not have much for needle or leaf drop (presuming that they remain healthy), thus conifers and not deciduous trees.