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Thuja, photographed by an iNaturalist contributor
(c) Donna Pomeroy, some rights reserved (CC BY-NC), uploaded by Donna Pomeroy · CC BY-NC
#369 most planted

Thuja

Arborvitae · also Thuja, New World false cedar, American arborvitae

ConiferEvergreen
2,961
trees mapped
0.03%
of all named trees
18
cities
5.9 in
median trunk (15 cm, 2,600 measured)

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Thuja is a genus of evergreen coniferous trees and shrubs, commonly known as arborvitaes. They typically have a spire-like habit and provide food and habitat for various wildlife. This genus is popular in cultivation due to its tolerance to air pollution and various soil types, though it requires ample moisture.

Where it grows

Trees in each city's inventory, with the share of that city's named trees this species accounts for.

  1. Toronto · Canada
    1,945—5.1 in
  2. Quebec City · Canada
    177—7.1 in
  3. Copenhagen · Denmark
    166——
  4. Paris · France
    157—13 in
  5. Kelowna · Canada
    109—11 in
  6. Montreal · Canada
    73—5.1 in
  7. London · United Kingdom
    68—3.9 in
  8. Boston · United States
    63—3.0 in
  9. Vancouver · Canada
    42—6.6 in
  10. Melbourne · Australia
    40—3.8 in
  11. Berlin · Germany
    3427 yr8.5 in
  12. Helsinki · Finland
    29—5.9 in
  13. Kingston · Canada
    20—3.0 in
  14. Amsterdam · Netherlands
    1137 yr9.8 in
  15. Victoria · Canada
    10—10 in
  16. Buenos Aires · Argentina
    8—3.1 in
  17. New Westminster · Canada
    5—1.0 in
  18. New York City · United States
    4—6.0 in

Traits

Form
Conifer
Foliage
Evergreen
Mature height
25–60 ft
Canopy spread
10–15 ft
Growth rate
Moderate
Water needs
Moderate
Drought tolerance
Moderate
Pollution tolerance
High
Wildlife value
High
Blooms
Mar, Apr, May

Trunk diameters across every city: median 5.9 in, mean 7.5 in, 90th percentile 15 in. Measured at breast height, as published by each inventory.

Native range

Terrestrial ecoregions where this species is native. Trees in the dataset mostly stand well outside it.

Temperate Broadleaf & Mixed Forests

  • Eastern Canadian Forest-Boreal transition
  • Eastern Great Lakes lowland forests
  • Central Korean deciduous forests
  • Northeast China Plain deciduous forests
  • Sichuan Basin evergreen broadleaf forests
  • Southern Korea evergreen forests

Other Thuja in the catalogue

4 of the top 2,000 species are in this genus.

Interested in talking trees? arborary.world@gmail.comTree data © the respective municipal publishers and © OpenStreetMap contributors (ODbL).