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Arborvitae

Thuja

These slow-growing trees create dense evergreen foliage that can make wonderful “living walls” when privacy is needed in the garden. Some varieties take on a bronze cast in the fall and winter, so be selective when picking an Arborvitae variety to plant in your yard. These trees stand up well to trimming and can be made into whimsical topiary plants to create living garden art. Arborvitae have long been used for their various medicinal properties.

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Light:

Part Sun, Sun

Type:

Height:

20 feet or more

Width:

10-15 feet

Foliage Color:

Seasonal Features:

Problem Solvers:

Special Features:

Zones:

2-7

Propagation

The Tree of Life

Native to North America, these rugged evergreen trees are often found growing in places where little else might. When early French settlers reached North America, they learned from Native Americans that these plants could be used to treat scurvy, a disease many of the sailors were suffering from. This is due to the high vitamin C content in young foliage, and it led it to the plant being named Arborvitae, which translates to "tree of life." Be extremely cautious, though—it will be toxic if used in excess, due to the neurotoxic compounds in the plant. These plants have also been used as food (in small amounts), lumber, and for their cleaning properties.

See more evergreens for every purpose.

Arborvitae Care Must-Knows

Arborvitaes grow best in consistently moist, almost swampy soils. While they love full sun, they can also manage in part sun. Their biggest downfall is drought conditions, especially during and leading up to winter. If fall has been dry, give these plants (especially young ones) supplemental water. This also helps prevent one of the biggest problems with Arborvitaes: winter burn.

Planting Arborvitaes in dry soil and exposed to winds during the winter will likely cause winter burn. The first sign of winter burn is browning of the leaves due to dryness. In severe situations, this can cause significant damage to Arborvitae; death is a possibility. Luckily, there are ways you can prevent winter burn. Select burn-resistant varieties, such as modern types that are significantly more burn resistant than older types. You can also site your Arborvitae to keep them out of direct sunlight and wind. Wrapping young and sensitive plants in burlap can also help as well.

A few pests may bother your Arborvitae. Spider mites can make a home of your evergreens, especially during the hot and dry days of summer. Unfortunately, by the time you find these pests, it'll be too late, as you'll most likely notice browning foliage due to their feeding that can't be reversed. Act quickly with an insecticidal soap or horticultural oil, but be careful if it is during the heat of the summer because these sprays can also cause the plants to burn.

Bagworms can also be bothersome on arborvitae. Much like spider mites, you may not notice these pesky worms until the damage is already done.  Typically in midsummer, you may notice little "bags" that look like little pinecones hanging all over your tree. These are actually the cocoons of bagworms. After eating their fill of foliage, bagworms will spin their cocoons; as they work, they cover the outside with little bits of leaf debris, camouflaging their resting place. Come spring, these little caterpillars will crawl out of their cocoons and fly out in search of a new host. The ideal time to treat them is as they are hatching, typically beginning in June. One of the safest things to spray while they are feeding (before hibernation) is Bacillus thuringiensis, but it's important to act quickly.

More Varieties of Arborvitae

Eastern red cedar

Thuja occidentalis is an especially tough type, native to areas of North America. It grows 60 feet tall and 15 feet wide at maturity. Zones 2-7

'Hetz Midget' Arborvitae

Thuja occidentalis 'Hetz Midget' forms compact globes that turn bronze in colder weather. It grows 32 inches tall and wide. Zones 2-7

'Little Gem' Arborvitae

Thuja occidentalis 'Little Gem' is a dwarf variety that forms a compact, dark green sphere 3 feet tall and 6 feet wide. Zones 2-7

Mr. Bowling Ball

Thuja occidentalis 'Bobozam' is a unique form of Arborvitae that maintains a very tight, ball-shape form, usually reaching 2 to 3 feet tall and wide. Zones 3-7

'Pyramidalis' Arborvitae

Thuja occidentalis 'Pyramidalis' is a fast-growing, conical evergreen often used for hedges and windbreaks. It grows 60 feet tall and 15 feet wide at maturity. Zones 2-7

'Rheingold' Arborvitae

Thuja occidentalis 'Rheingold' bears golden foliage that is sometimes pink-tinted when young, on a conical shrub growing 3 to 6 feet tall. Zones 2-7

'Smaragd' Arborvitae

Thuja occidentalis 'Smaragd' is a dwarf variety that forms bright green cones. It grows 3 feet tall and wide. Zones 2-7

'Sunkist' Oriental Arborvitae

Thuja orientalis 'Sunkist' is a dwarf globe-shape variety with gold-tipped leaves. It grows 2 feet tall and wide. Zones 6-9

'Techny' Arborvitae

Thuja occidentalis 'Techny' slowly grows into a dense evergreen pyramid; excellent choice for using as a hedge. It grows 15 feet tall and 8 feet wide. Zones 2-7

Woodward Globe Arborvitae

Thuja occidentalis 'Woodwardii' forms a dark green sphere that grows 8 feet tall and 15 feet wide. Zones 2-7

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