Answer: This is quite a large tree at maturity so it will require a wide space. The mature size tree is roughly 50 feet high (or higher) and between 15 to 20 feet wide, so you want to allow ten feet out from the fence so it does not overhang your neighbor's property. You could space the trees about 15 feet apart to allow them space to grow. If this is too large, you may want to consider some other evergreens instead. (Deciduous shrubs can also help break the wind quite effectively.) Your local county extension and/or professionally trained nurseryman should be able to help you select something that will serve as a windbreak as well as fit the space and meet your overall design goals. Good luck with your project!
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