Spacing of fastigiate european hornbeam
I'm a newbie who has been lurking on the board, so take it easy on me. I have a 12 ft wide side yard, then a 2 ft wide 6 ft tall hedge row, then my neighbor has a 4 ft wide side yard. I want to to block the view of my neighbor's second floor. My current plan is to plant two Fastigiate European Hornbeams about 6 ft apart from one another. I'd like to plant the tree's as close to the hedge row as possible and limb them up over time so that there are no branches on the bottom 6 feet. Any suggestions on minimum distance from the hedge row, if I'll need to bring the hedges down from their current 6 foot height, or if my limbing up plans are too aggressive? Any recommendation for alternative trees that I should consider? I'm in Zone 7a, location gets 8-10 hours of sun, soil is decent and seems to drain ok.