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'RSM I4' rose Description
'Morden Centennial' rose photo
Photo courtesy of prairie_northrose
Availability:
Commercially available
Synonyms:
HMF Ratings:
36 favorite votes.  
Average rating: GOOD+.  
Origin:
Bred by Henry H. Marshall (Canada, 1972).
Class:
Shrub.   (Series: Parkland Series Collection)  
Bloom:
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.  
Habit:
Medium, bushy, dense.  Semi-glossy, dark green foliage.  7 leaflets.  

Height: 3' to 4' (90 to 120cm).  Width: 6' (185cm).
Growing:
USDA zone 3b and warmer.  Can be used for beds and borders, cut flower or garden.  Very hardy.  Disease susceptibility: susceptible to blackspot .  
Patents:
Patent status unknown (to HelpMeFind).
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.

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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