There are several varieties of Arborvitae in the nursery trade. These trees narrow leaf evergreens and are related to our native White Cedar. The Arborvitae most readily available in Garden Center are Dark Green
(Thuja occidentalis ‘nigra’), Emerald (Thuja occidentalis ‘Smaragd’). and Green Giant. These varieties are readily available and are therefore less expensive at the consumer. Dark Green can grow 20+ feet tall and 4+feet wide with dark green foliage and Emeralds grow 10-15 feet and 3+feet wide with lighter green foliage. Dark Green can withstand heavy pruning/shearing and kept to a small size four’ to five’ tall. Pruning also helps keep them from” opening up” as they grow older. Unlike the Native White Cedar that grows in swampy areas, they do not respond well to excessive watering. When planting to create a solid hedge, we suggest planning Emerald Arborvitae 2 ½ to3 feet apart and Dark Greens 4 to 4 ½ feet apart. Arborvitae can create a relatively narrow evergreen screen. They are often planted on or next to property lines for years around privacy-especially useful when space is an issue.
If you desire a wider growing Arborvitae there is Techny Arborvitae (also called Mission Arborvitae). Techny has dark green foliage and will grow 12+ feet tall and 8 feet wide, we suggest planting them 6 feet apart. They will eventually grow to a solid evergreen screen. Note, too, that Arborvitae can be effective when planted singularly or in groups. Arborvitae respond well to use of organic fertilizer like Morganite or Cow Manure.
Green Giant Arborvitae (Thuja plicata ‘green giant’) is a rapid grower and is said to be dear resistant. Plant them five or more feet apart to create a screen. Foliage is little coarser than Dark Green. It needs extra pruning because of its rapid growth.
We typically carry and grow Dark Green, Emerald, Techny and Green Giant Arborvitae. At this time we carry a limited number of dwarf Techny arborvitae ‘Bailjohn’ that matures around 6’ tall. They require little pruning.