Thuja occidentails 'Nigra'
One of the best dark green varieties for cold climates. When many other arborvitae look yellow-brown in winter, 'Nigra' retains its deep, dark green color. Easy to prune. Useful as a specimen, accent, hedge and commonly found in foundation plantings. Prefers deep, well-drained soil and full sun.
Height: 20-30'
Spread: 4-10'
Shape: Pyramidal
Exposure: Full Sun
Foliage: Dark green
Zone: 3-7