Juglans sp. (Butternut/Walnut)

 
 
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Juglans cinerea
Butternut

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Recommendation: recommended only at Edmonton and Brooks, growth was satisfactory at Grande Prairie, all trees had winter injury every winter resulting in a shrubby appearance.
Trial Average:
Height: 1.3 m; Spread: 1.1 m
Form:
slow growing tree with wide-spreading crown.
Features:
green leaves, nuts are edible.
Culture:
prefers moist rich soils, can tolerate dry rocky soils.

Site
Grande Prairie
Edmonton
Lacombe
Bowden
Calgary
Brooks
Coaldale 1
Trial Period
87 - 94
83 - 91
87 - 94
84 - 94
83 - 91
83 - 91
84 - 91
Height-Spread
94 - 69
120 - 174
105 - 51
133 - 156
172 - 115
Rating
3
3.8
2.6
3.8
2.7
Recommendation
S
R
n
N
N
R
N

Juglans mandschurica
Manchurian Walnut

Recommendation: satisfactory growth in Edmonton, Brooks and Coaldale, not recommended or failed at other locations, plants are shrubby, buds break early and are often damaged by late spring frosts.
Trial Average:
Height: 1 m; Spread: 1.1 m
Form:
tree with spreading crown, dwarfed by heavy dieback due to spring frost.
Features:
green leaves.
Culture:
prefers moist rich soils.

Site
Grande Prairie
Edmonton
Lacombe
Bowden
Calgary
Brooks
Coaldale 1
Trial Period
88 - 94
87 - 94
88 - 94
88 - 94
87 - 94
88 - 94
Height-Spread
208 - 258
52 - 30
92 - 102
93 - 93
60 - 62
Rating
3.2
2.6
2.6
3.4
3
Recommendation
F
S
n
N
S
S

Juglans nigra
Black Walnut




Recommendation: Satisfactory in Brooks and Edmonton though only two survived in Edmonton. Not recommended for Calgary where only two survived and suffered much winter kill. The plants failed in Red Deer, Bowden and Coaldale and were not tested in Fairview. A selection from Jeffries Nursery, MB.
Trial Average:
Height: 131 m; Spread: 103 m
Form:
open, oval to rounded tree.
Features:
dark green leaves with edible nuts.
Culture:
prefers rich, moist soils

Site
Fairview
Edmonton
Bowden
Red Deer
Calgary
Brooks
Coaldale 2
Trial Period
96 - 01
96
97
96 - 01
96 - 01
96
Height-Spread
134 - 125
124 - 93
134 - 90
Rating
3
2.5
2.5
Recommendation
S
F
F
N
S
F

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 2, 2003.
Last Reviewed/Revised on January 6, 2014.