If you have deer that wander through your yard, most varieties of arborvitae are like candy to them. Consider using upright junipers in your green screen instead. Junipers also tolerate salt spray better than arborvitaes so can be situated near a road. Just give upright junipers plenty of sunlight and avoid areas that hold water.
My favorite upright junipers are anything but ordinary with their wide array of shapes, colors, and textures. Hill Dundee Juniper turns an amazing rich plum color in winter. Skinny Trautman Juniper will easily fit into a tight space, like between a retaining wall and a patio. The blue-green needles of Star Power™ Juniper are not only beautiful but sharp, so the deer are guaranteed to stay away (and any neighbors you want to keep out).
As with any landscape project, I am an advocate of diversity. Going with only one kind of tree in your green screen increases the risk of losing your investment if a disease or pest is introduced – remember the Colorado Spruces. And a green screen doesn’t have to be only conifers.
Golden Glory Corneliancherry Dogwood has beautiful yellow flowers as one of the first signs of spring. But in summer the dense upright branches are full of thick green leaves. A multi-stem or shrub-form tree branched low to the ground gives you even more coverage. Sentinel Crabapple is another favorite of mine to add to a green screen.
The trees mentioned are a small sample of the plants available to create successful green screens. This is why it’s so important that you get the advice of a horticulturist or landscape designer if you are unsure of what will work best in your yard.