Answer: Your zip code places you in zone 6B so you have a pretty wide range of choices. You could use yews trimmed to a formal shape, you could use blue hollies left naturally pyramidal or sheared, you could use a small leafed holly such as SkyPencil. You could use upright junipers or naturally conical junipers. You could use upright arborvitaes. These are just a few ideas. I would suggest you work with your county extension and/or professionally trained nurseryman to make a selection that meets your design goals and will also thrive in the growing conditions where you want to plant these trees. Good luck with your project!
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