Family: Rosaceae (ro-ZAY-see-ee) (Info)
Genus: Rosa (RO-zuh) (Info)
Cultivar: Margaret Merril
Additional cultivar information: (aka Harkuly)
Hybridized by Harkness; Year of Registration or Introduction: 1977
» View all varieties of Roses  2 vendors have this plant for sale.
One member has or wants this plant for trade. Class:
Cluster-flowered (incl. Floribunda & Grandiflora)
Height:
36-48 in. (90-120 cm)
4-6 ft. (1.2-1.8 m)
Spacing:
24-36 in. (60-90 cm)
36-48 in. (90-120 cm)
Hardiness:
USDA Zone 6a: to -23.3 °C (-10 °F)
USDA Zone 6b: to -20.5 °C (-5 °F)
USDA Zone 7a: to -17.7 °C (0 °F)
USDA Zone 7b: to -14.9 °C (5 °F)
USDA Zone 8a: to -12.2 °C (10 °F)
USDA Zone 8b: to -9.4 °C (15 °F)
USDA Zone 9a: to -6.6 °C (20 °F)
USDA Zone 9b: to -3.8 °C (25 °F)
USDA Zone 10a: to -1.1 °C (30 °F)
USDA Zone 10b: to 1.7 °C (35 °F)
Bloom Color:
White (w)
Bloom Shape:
Double
Tea shaped
Flower Fragrance:
Very Fragrant
Bloom Time:
Late Spring/Early Summer
Blooms repeatedly
Habit:
Shrub
Can be trained as a standard or tree form
Patent Information:
Non-patented
Other Details:
Susceptible to black spot
Susceptible to mildew
Susceptible to rust
Pruning Instructions:
Blooms on new wood; prune early to promote new growth
Soil pH requirements:
5.6 to 6.0 (acidic)
6.1 to 6.5 (mildly acidic)
Propagation Methods:
From softwood cuttings
From semi-hardwood cuttings
From hardwood cuttings
By grafting
By budding
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