Commercially available

• Cuthbert Grant
• RSM 30

41 favorite votes.  
Average rating: EXCELLENT-.  

Dark red Shrub.
Registration name: Cuthbert Grant

Bred by Henry H. Marshall (Canada, 1958).
Introduced in Canada by Agriculture Canada, Morden, Manitoba in 1967 as 'Cuthbert Grant'.

Hybrid Suffulta, Shrub.   (Series: Parkland Series Collection)  

Red, purple shading.  Mild to strong fragrance.  15 to 20 petals.  Average diameter 4".  Large, double (17-25 petals), cupped bloom form.  Occasional repeat later in the season.  

Glossy, light green foliage.  

Height: 3' to 4' (90 to 120cm).  Width: 3' (90cm).

USDA zone 3b and warmer.  Benefits from winter protection in colder climates.  Disease susceptibility: susceptible to blackspot .  

Triploid

See References for parentage.
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.

Ploidy checked by David Zlesak.