Prunus sp. (Mayday/Cherry)

 
 
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Prunus x 'Carmine Jewel'
Carmine Jewel Cherry (COPF)



Recommendation: planted in trial in 2003. University of Saskatchewan cultivar. Recommended at Fairview, Calgary and Brooks, with some plants beginning to produce cherries in the second season. Rated satisfactory at Edmonton as plants suffered damage from deer and in Red Deer where all but one plant were lost, but survivor did very well. All plants had failed at Coaldale after two seasons.
Trial Average:
Height:114 cm.; Spread: 116 cm.
Form:
large shrub.
Features:
white spring blossoms, dark green glossy leaves. Dark red fruit, suitable for processing.
Culture:
Train as a tall shrub. Avoid excess nitrogen fertilizer to maximize fruit production.

Site
Edmonton 2
Fairview
Red Deer
Calgary
Brooks
Coaldale 2
Trial Period
03 - 08
03 - 08
03 - 08
03 - 08
03 - 07*
03 - 08
Height-Spread
71 – 62
104 - 100
90 – 90
143 - 153
160 – 174
Rating
2.7
3.75
3.5
4
4
Recommendation
S
R
S
R
r
F
*Evaluations at Brooks Site were discontinued after 2007

Prunus maackii 'Jefree'
Goldrush® Amur Cherry


Recommendation: planted in trial in 2006. Selected at Jeffries Nursery
Trial Average:
Height: ---; Spread: ---
Form:
small tree.
Features:
dark green foliage, and flaky orange bark. Selected for improved resistance to frost cracking.
Culture:
full sun regular water.

Prunus nigra 'Princess Kay'
Princess Kay Plum




Recommendation: failed the first year in Fairview and after the third winter in Edmonton. Not recommended in Coaldale where the three remaining plants were in poor shape. Recommended in Red Deer, Calgary and Brooks but requires pruning to maintain shape.
Trial Average:
Height: 2.7 m; Spread: 1.6 m
Form:
narrow tree, upright branches, dark bark.
Features:
green leaves, showy white flowers in spring, black bark stands out in winter, will develop fruit.
Culture:
requires annual maintenance pruning. Pear slug noticed - but minor.

Site
Fairview
Edmonton
Red Deer
Calgary
Brooks
Coaldale 2
Trial Period
99 - 04
99 - 04
99 - 04
99 - 04
91 - 96
99 - 04
Height-Spread
265 - 156
305 - 181
247 - 150
267 - 165
Rating
3.5
3
2.7
2
Recommendation
F
F
R
R
R
N

Prunus padus 'Ethel' (COPF)
Ethel Mayday




Recommendation: planted in trial in 2002. Introduction by Lloyd E. Lee. Plants failed in Coaldale in second season, only one survived in Red Deer. All trees survived in Calgary, Fairview and Brooks and though the plants put on a lot of growth and produced good pink flowers each spring, they are not recommended in any sites due to very poor form and structure.
Trial Average:
Height: 3.5 m ; Spread: 2.9 m
Form:
open structured tree.
Features:
green leaves, pink flowers.
Culture:
specimen tree.


Site
Fairview
Red Deer
Calgary
Brooks
Coaldale 2
Trial Period
02 - 07
02 - 07
02 - 07
02 - 07
02 - 07
Height-Spread
2.8 – 1.6
3.3 – 2.1
4.5 – 4.1
3.1 – 3.1
Rating
1.3
2
2.2
1
Recommendation
N
N
N
N
F

Prunus padus 'Foothills'
Foothills Mayday


Recommendation: ratings for growth and hardiness were excellent for all locations tried except Fairview where the plants suffered major dieback each year. The plant is not recommended due to poor shape and weak crotch angles resulting in significant breakage at all locations.
Trial Average:
Height: 420 cm; Spread: 330 cm
Form:
small tree with wide, spreading crown, too open for most ornamental uses.
Features:
green leaves, orange-yellow fall color, numerous fragrant flower clusters in May to early June.
Culture:
adapted to a wide range of soils though leaves show chlorosis in soils with high pH. Annual pruning and training recommended to avoid poor shape and breakage.

Site
Fairview
Edmonton
Bowden
Red Deer
Calgary
Brooks
Trial Period
95-00
91 - 97
91 - 97
92 - 97
91 - 96
91 - 96
Height-Spread
171 - 142
558 - 409
409 - 328
455 - 312
457 - 349
237 - 232
Rating
2
5
5
5
4.5
4.5
Recommendation
F
N
N
N
N
N

Prunus padus 'Sunstar'
Sunstar Mayday




Recommendation: recommended in Red Deer, Brooks and Coaldale, satisfactory in Fairview and Calgary although only 2 plants survived at either site. Not recommended in Edmonton where the poor plants were removed after the 2001 evaluation. Selected by Sunstar Nurseries, Edmonton, AB.
Trial Average:
Height: 3.7 m; Spread: 2.3 m
Form:
vigorous, round-headed tree.
Features:
green leaves, white flower clusters, very fragrant.
Culture:
routine pruning required to keep vigorous growth under control.

Site
Fairview
Edmonton
Red Deer
Calgary
Brooks
Coaldale 2
Trial Period
98 - 03
98 - 01
98 - 03
98 - 03
98 - 03
98 - 03
Height-Spread
278 - 158
158 - 48
342 - 208
503 - 308
408 - 294
515 - 330
Rating
3
2
3.6
3.5
4
4.2
Recommendation
S
n
R
S
R
R

Prunus virginiana 'Midnight'
Midnight Schubert Chokecherry (COPF)




Recommendation: Selection from Lakeshore Tree Farms, Saskatoon, SK. Not planted at Fairview. Highly recommended at all sites except Red Deer where two of the five plants were lost first season - still recommended as survivors have done very well.
** A black knot canker was found on one specimen in Calgary which was removed - no further infection was found on that tree or any other in trial. Caution is advised for areas where black knot is a major problem.
Trial Average:
Height: 3.6 m ; Spread: 2.8 m
Form:
upright tree.
Features:
deep purple leaves, non-suckering - multi-stemmed.
Culture:
specimen tree.

Site
Fairview
Edmonton
Red Deer
Calgary
Brooks
Coaldale 2
Trial Period
01 - 06
01 - 06
01 - 06
01 - 06
99 - 04
Height-Spread
271 - 222
227 - 215
431 - 339
458 - 328
441 - 299
Rating
4
4.3
4
4
4
Recommendation
H
R
H
H
H

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 3, 2003.
Last Reviewed/Revised on January 6, 2014.