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'Alexander MacKenzie' rose Description
'Alexander MacKenzie' rose photo
Photo courtesy of John's Minnesota Rose Garden
Availability:
Commercially available
Synonyms:
HMF Ratings:
51 favorite votes.  
Average rating: EXCELLENT-.  
ARS:
Red blend Shrub.
Registration name: A. Mackenzie
Exhibition name: A. Mackenzie
Origin:
Introduced in Canada by Agriculture Canada, Ottawa, Ontario (Central Experimental Farm) in 1985 as 'Alexander MacKenzie'.
Class:
Climber, Shrub.  Explorer Series Collection.  
Bloom:
Red blend, yellow undertones.  Moderate, raspberry fragrance.  40 to 50 petals.  Average diameter 3".  Medium, very full (41+ petals), in large clusters, cupped bloom form.  Occasional repeat later in the season.  Pointed, ovoid buds.  
Habit:
Arching, climbing, upright.  Glossy, light green foliage.  
Height of 5' to 8' (150 to 245 cm).  Width of up to 7' (up to 215 cm).
Growing:
USDA zone 3b and warmer.  Can be used for landscape or shrub.  Very hardy.  Disease susceptibility: disease resistant.  Remove spent blooms to encourage re-bloom.  
Ploidy:
Triploid
Notes:
In September 1998, the Montreal Botanical Garden (Le Jardin Botanique de Montreal) carried out a survey of its roses' resistance to black spot, powdery mildew and rust. This is one of the outstanding varieties which showed a 0% to 5% infection rate. The data were taken on well-established roses.

Dr. Felicitas Svejda gives the parentage as 'Queen Elizabeth' x ('Red Dawn' x 'Suzanne') x 2 cycles of open pollination.

Ploidy count by David Zlesak.
 
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