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'RSM I4' rose Description
'Morden Centennial' rose photo
Photo courtesy of Eugene V.
Commercially available
HMF Ratings:
35 favorite votes.  
Average rating: GOOD+.  
Bred by Henry H. Marshall (Canada, 1972).
Shrub.  Parkland Series Collection.  
Pink.  Mild fragrance.  40 to 45 petals.  Average diameter 4".  Large, very full (41+ petals), in small clusters bloom form.  Blooms in flushes throughout the season.  Ovoid buds.  
Medium, bushy, dense.  Semi-glossy, dark green foliage.  7 leaflets.  
Height of 3' to 4' (90 to 120 cm).  Width of 6' (185 cm).
USDA zone 3b and warmer.  Can be used for beds and borders, cut flower or garden.  Very hardy.  Disease susceptibility: susceptible to blackspot .  
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.

MR12 has 'Prairie Princess' x ('White Bouquet' x (J. W. Fargo' x 'Assiniboine'))
‘Prairie Princess’, ‘White Bouquet’, ‘Assiniboine’, R. arkansana [Winter Hardy Roses]
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