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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. |
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