Ulmus sp. (Elm)

 
 
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Ulmus americana
American Elm

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Recommendation: recommended at all locations except at Calgary site; however, elms are known to grow well in Calgary.
Trial Average:
Height: 2.8 m; Spread: 2.4 m
Form:
large tree with vase-shaped crown.
Features:
green leaves, yellow in fall.
Culture:
prefers rich, moist soils but does well in a variety of soils, tolerates urban conditions, tolerant to high pH and salty soils, subject to a number of insect pests and diseases. Susceptible to Dutch Elm Disease.

Site
Grande Prairie
Edmonton
Lacombe
Bowden
Calgary
Brooks
Coaldale 1
Trial Period
83 - 88
84 - 88
86 - 94
84 - 94
83 - 88
83 - 88
84 - 94
Height-Spread
298 - 348
231 - 211
337 - 241
162 - 170
356 - 312
318 - 156
Rating
3.4
5.0
4.0
4.7
2.0
3.5
4.4
Recommendation
R
H
r
H
N
R
R
* Alberta is Dutch Elm Disease free at this time (2008)

Ulmus americana 'Brandon'
Brandon Elm



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Recommendation: recommended at all locations, may require some training when young to develop good form, has weak branch angles making it susceptible to splitting from heavy snow or strong winds.
Trial Average:
Height: 4.5 m; Spread: 2.5 m
Form:
tree with an upright, spreading crown (more compact than the species).
Features:
green leaves, yellow in fall.
Culture:
prefers rich, moist soils, tolerates urban conditions, subject to a number of insect pests and diseases. Susceptible to Dutch Elm Disease.

Site
Grande Prairie
Edmonton
Lacombe
Bowden
Calgary
Brooks
Coaldale 1
Trial Period
88 - 94
88 - 94
88 - 94
88 - 94
88 - 94
88 - 94
88 - 94
Height-Spread
495 - 271
581 - 365
286 - 118
422 - 181
517 - 358
535 - 350
298 - 114
Rating
5.0
5.0
5.0
4.9
5.0
4.9
4.4
Recommendation
H
H
h
H
H
H
R
* Alberta is Dutch Elm Disease free at this time (2008)

Ulmus davidiana var japonica 'Discovery'
Discovery Japanese Elm (PPAF)




Recommendation: Introduced by R. Durrand, MB. Failed at all sites except two trees in Brooks which were satisfactory
Trial Average:
Height: 4.6 m Spread: 3.1 m
Form:
upright, vase shaped tree, similar to American Elm, but smaller.
Features:
green leaves, yellow in fall.
Culture:
highly resistant to Dutch Elm Disease, cold hardy. Selected for disease resistance, surviving plants had poor branching habits requiring pruning to strengthen crotches.

Site
Fairview
Edmonton
Red Deer
Calgary
Brooks
Coaldale 2
Trial Period
00 - 05
00 - 05
00 - 05
00 - 05
00 - 05
00 - 05
Height-Spread
456 - 314
Rating
3
Recommendation
F
F
F
F
S
F
* Alberta is Dutch Elm Disease free at this time (2008)

Ulmus pumila
Manchurian/Siberian Elm



Recommendation: recommended at all locations except Coaldale 1 where growth was only satisfactory, requires pruning to maintain form.
Trial Average:
Height: 2.9 m; Spread: 3.3 m
Form:
upright, spreading tree with fine branching.
Features:
small, green leaves, yellow in fall.
Culture:
tolerates many soil conditions, resistant to Dutch elm disease, fast growing, weak branch angles, brittle wood breaks easily, weedy due to seedlings, susceptible to a bacterial disorder called bacteria wetwood.

Site
Grande Prairie
Edmonton
Lacombe
Bowden
Calgary
Brooks
Coaldale 1
Trial Period
83 - 91
83 - 91
87 - 94
84 - 94
83 - 91
83 - 91
84 - 94
Height-Spread
290 - 331
239 - 269
355 - 364
130 - 199
406 - 572
339 - 218
Rating
3.8
4.5
3.9
4.2
3.5
4.3
2.9
Recommendation
R
R
r
R
R
R
S
* Alberta is Dutch Elm Disease free at this time (2008)

Rating: 0-dead, 1-poor, low sprouts, 2-major dieback, 3-fair, injury to branches, 4-good, some tip kill, 5-excellent, no injury
Recommendations: H-Highly recommended, R-Recommended, S-Recommended with extra care, N-Not recommended, F-Failed due to unfavorable conditions.

 
 
 
 
For more information about the content of this document, contact Shelley Barkley.
This information published to the web on June 10, 2003.
Last Reviewed/Revised on January 6, 2014.