Climbing Rose, Shrub 'A. Mackenzie'

Rosa

Family
Rosaceae (ro-ZAY-see-ee)
Genus
Rosa (RO-zuh)
Synonym
Additional cultivar information
(Explorer Series Collection; aka Alex Mackenzie, Alexander Mackenzie)
Hybridized
Svejda
Registered or introduced
1970
Height
4-6 ft. (1.2-1.8 m)
6-8 ft. (1.8-2.4 m)
Spacing
6-8 ft. (1.8-2.4 m)
Hardiness
USDA Zone 3a: to -39.9 °C (-40 °F)
USDA Zone 3b: to -37.2 °C (-35 °F)
USDA Zone 4a: to -34.4 °C (-30 °F)
USDA Zone 4b: to -31.6 °C (-25 °F)
USDA Zone 5a: to -28.8 °C (-20 °F)
USDA Zone 5b: to -26.1 °C (-15 °F)
USDA Zone 6a: to -23.3 °C (-10 °F)
USDA Zone 6b: to -20.5 °C (-5 °F)
USDA Zone 7a: to -17.7 °C (0 °F)
USDA Zone 7b: to -14.9 °C (5 °F)
USDA Zone 8a: to -12.2 °C (10 °F)
USDA Zone 8b: to -9.4 °C (15 °F)
USDA Zone 9a: to -6.6 °C (20 °F)
USDA Zone 9b: to -3.8 °C (25 °F)
USDA Zone 10a: to -1.1 °C (30 °F)
USDA Zone 10b: to 1.7 °C (35 °F)
USDA Zone 11: above 4.5 °C (40 °F)
Bloom Time
Late Spring/Early Summer
Blooms repeatedly
Bloom Color
Red blend (rb)
Class
Shrub
Other Details
Propagation Methods
From softwood cuttings
From semi-hardwood cuttings
From hardwood cuttings
By grafting
By budding
Soil pH requirements
5.6 to 6.0 (acidic)
6.1 to 6.5 (mildly acidic)
Flower Fragrance
Very Fragrant
Bloom Shape
Double
Cupped
Habit
Shrub
Trained to climb
Patent Information
Non-patented
Other Details
Pruning Instructions
Blooms on new wood; prune early to promote new growth
Foliage Color
Bloom Characteristics
Water Requirements
Where to Grow
Regional

This plant is said to grow outdoors in the following regions:

Alfred, Maine

Ann Arbor, Michigan

Pelham, New Hampshire

, Ontario

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Gardener's Notes:

2
positives
2
neutrals
0
negative
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H
Pelham, NH | June 2010 | positive

This is possibly the best rose in my garden. It is a huge shrub rose which seldom suffers any die-back at all here in NH zone 5b. Very ...Read More

R
Newmarket, ON (Zone 5a) | November 2006 | neutral

"Explorer" series rose developed by Agriculture and Agri-Food Canada to create hardy roses for Canadian climates.

K
K
Alfred, ME (Zone 4a) | April 2006 | positive

Have 10 in ground, loaded w/ blooms all summer, starts 1st. wk. of May. Needs no winter protection here in zone 4a. Very little ( few inc...Read More

P
Irving (Dallas area), TX (Zone 8a) | May 2004 | neutral

Bren in Canada.

Prentage:
Seed: Pristine
Pollen: Admiral Rodney

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