I would like to plant a hedge along the north and west property lines of my backyard. Would you please provide input/suggestions/advice? I have looked into several choices of trees and conifers, and am about to settle on Hetz Wintergreens (arborvitae), which would be planted about 4 to 4.5 feet on center. I've chosen these because they stay narrow but will get tall, will provide a better screen than Smargard/Green Emerald (which also was in the running), will take moister soil (compared to Emily Bruner holly, which also was in the running), and will be less maintenance. But before I place my order, I'd love to hear your feedback, both pros and cons of using the Hetz. And I am open to other suggestions!

For background -- Our home is on a suburban lot (12,000 sq. ft.) in the metro DC area, and we'd like more privacy and a sense of enclosure (or sectioned garden rooms). I want to maximize lawn space for our kids. And based on our home/area, I would like a more formal planting scheme. Attached are photos of our backyard. The longer run (northern exposure, although a lot of sun because there aren't large trees planted) is around 75 feet from the corner to the stone wall (where the grass steps are located).

Let me know if additional information would be helpful.

Thanks! Jody

West side run - hedge would start where hollies are now (they are diseased, lots of problems because they weren't taken care of/properly pruned)

North side run

(Tree in photo above by telephone pole removed by utility company)

Loggia is opposite long run of hedge