A tall, upright, vigorous shrub reaching heights of 5′ to 6′. Deep red, cup-shaped flowers with 40 to 50 petals are produced in clusters. Repeat bloomer. Bred by Dr. Felicitas Svejda (Canada, before 1985).Introduced in Canada by Agriculture Canada, Ottawa, Ontario (Central Experimental Farm) in 1985 as 'Alexander MacKenzie'. Super cold-hardy to zone 3.
Alexander McKenzie
https://www.jacksonandperkins.com/blaze-improved-climbing-rose/p/38420/