Tree
Eastern Arborvitae, American Arborvitae
Thuja occidentalis
Features
Evergreen needles.
Culture
Full sun; moist, well drained soil, but can tolerate wet soils; tolerant of alkaline soils.
Cultivars
Many, including
- 'Emerald'- narrow habit and grows 10-15 feet tall, very cold hardy and maintains good color in winter.
- 'Nigra'-20-30 feet tall, maintains good color in winter, very cold hardy.
- 'Techny'- 10-15 feet tall, very cold hardy, maintains good color in winter.
- 'Wintergreen'-20-30 feet tall and nearly columnar, good winter color.
Mature Height
20-40 Feet
(Small cultivars exist)
Size
Medium
Mature Form
Broadly pyramidal
Native To:
United States
USDA Hardiness Zone
3 - 7
Soil Conditions
Moist, Well-Drained
Wet
Tolerance
Alkaline Soil
Soil Compaction
Wet Sites
Exposure/Light Requirements
Full Sun
Uses
Massing
Screen
Specimen
Foliage Color
Green
Fall Foliage Color
Green
Pests and Problems
Environmental Damage
Fungal Disease
Insect Damage
Additional pests and problems that may affect this plant:
Leaf miner, mealybug, scale insect, twig blight, and cankers. Prone to damage from wind, snow and ice. Heavily browsed by deer.
Additional Notes
Related Resources
Home, Yard & Garden Pest Guide
The Home, Yard & Garden Pest Guide (C1391) provides is written for homeowners and other residents and provides nonchemical and current chemical recommendations for controlling pests associated with trees, shrubs, turf, flowers, groundcovers, vegetables, fruit, and houses. In addition, you'll find detailed information about integrated pest management, pesticide safety, and pesticide application and calibration techniques. This publication may be purchased at your local University of Illinois Extension Unit office, or by calling 800-345-6087, or by placing an order online (search for "C1391").
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Illinois Commercial Landscape and Turfgrass Pest Management Handbook
The Illinois Commercial Landscape and Turfgrass Pest Management Handbook (ICLT) is written for professional applicators and provides nonchemical and current chemical recommendations as well as application timing information for all major pests of turf, woody ornamentals and herbaceous ornamentals. This publication may be purchased at your local University of Illinois Extension Unit office, or by calling 800-345-6087, or by placing an order online (search for "ICLT").
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U of IL - Distance Diagnosis through Digital Imaging
A free plant, weed, insect and disease identification service available through your local University of Illinois Extension office. Center Educators or State Specialists review & respond to information and digital images submitted by local Extension office personnel. Some samples may require further examination or culture work (nominal fee involved) at the U of IL Plant Clinic.
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U of IL - Plant Clinic
Services include plant and insect identification, diagnosis of disease, insect, weed and chemical injury (chemical injury on field crops only), nematode assays, and help with nutrient related problems, as well as recommendations involving these diagnoses. Microscopic examinations, laboratory culturing, virus assays, and nematode assays are some of the techniques used in the clinic.
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