'58180901' Rose

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'58180901' rose Description

My HMF:

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Photo courtesy of prairie_northrose

Availability:

Commercially available

Synonyms:

• Cuthbert Grant
• RSM 30

HMF Ratings:

41 favorite votes.
Average rating: EXCELLENT-.

ARS:

Dark red Shrub.
Registration name: Cuthbert Grant

Origin:

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

Class:

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

Bloom:

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.

Habit:

Glossy, light green foliage.

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

Growing:

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

Patents:

Patent status unknown (to HelpMeFind).

Ploidy:

Triploid

Parentage:

RSM 18 × Assiniboine

Notes:

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.