The arborvitae (Thuja) genus of shrubs and trees includes three different species comprising a large number of evergreens. Their popularity is largely due to their fast-growing, easy-to-care-for nature and the year-round visual interest they bring to a landscape. One of the more popular cultivars of the Thuja occidentalis species of arborvitae is 'Emerald Green,' which is highly prized as a hedge or screen plant, especially in colder climates. This cultivar is sometimes known as 'Smaragd,' because the plant was originally developed in Denmark (Smaragd is the Danish word for emerald).'Emerald Green' is a semi-dwarf cultivar that has a narrow pyramidal shape. The foliage consists of flat sprays of glossy bright green. The tree has urn-shaped cones about 1/2 inch long that turn reddish brown in fall. Most specimens are 7 to 15 feet in height, occasionally reaching 20 feet. It can also make a good foundation plant and is sometimes planted singly as a landscape specimen plant. Occasionally, this plant is pruned to form spiral topiaries.
Smaragd Arborvitae Care
Thuja Occidentalis 'Emerald Green'
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Humidity
Normal
Lighting
Full Sun
Hardiness zone
2 - 7
Difficulty
Medium
How to Care for the Plant
Water
Emerald green arborvitae (thuja occidentalis 'smaragd') is a fuss-free tree. growing in a sunny spot and average soil, this pyramid-shaped evergreen requires regular watering only to provide some moisture.
Pruning
By removing overgrown foliage, you will improve airflow to the plant, and light will be better able to penetrate all portions of the plant. This actually leads to a fuller and healthier looking houseplant.
Fertilizer
Use a fertilizer formulated specifically for your plant. Avoid over-fertilizing and follow the instruction on the label.
Sunlight
In most cases, plants receiving no outdoor light should be lit from 16 to 18 hours each day. If some additional light is received, 12 to 14 hours each day may be adequate. Lights should be used at the same time that plants receive window light.
Soil
Prefer fertile soil, preferably loose and loamy with adequate drainage.
Temperature
Emerald Green' arborvitae does better in cooler, dryer climates. In very humid conditions, fungal diseases can be a problem; help prevent this by improving air circulation. Avoid exposed, windy locations, especially in colder climates.
Container
When choosing a pot, choose a pot that is 2.5-5 cm (1-2”) larger than the current size. Ceramic pots are porous which means your plants are less likely to experience root rot from overwatering. It also means you'll have to water more often. Plastic pots are lighter, less likely to break, and easier to clean.
Popularity
1,170 people already have this plant 117 people have added this plant to their wishlists
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