e live in Harpers Ferry, WV and are looking for privacy trees to plant in our backyard. Our soil stinks and has a ton of huge rocks. We first considered leyland cypress, but the lifespan is too short. Our local landscaper suggested the green giant. I'm concerned about having a tree that could get to 60 feet! We have houses directly behind us and thats way too tall. Other sites say they get 40 feet. Any suggestions? Thanks!