Photo by Melody

PlantFiles: Large Flowered Climbing Rose
Rosa 'Thor'

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Family: Rosaceae (ro-ZAY-see-ee) (Info)
Genus: Rosa (RO-zuh) (Info)
Cultivar: Thor
Additional cultivar information: (PP387)
Hybridized by Horvath; Year of Registration or Introduction: 1940

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Class:
Modern Climber

Height:
10-12 ft. (3-3.6 m)
12-15 ft. (3.6-4.7 m)

Spacing:
6-8 ft. (1.8-2.4 m)

Hardiness:
USDA Zone 5b: to -26.1 C (-15 F)
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)
USDA Zone 11: above 4.5 C (40 F)

Bloom Color:
Dark red (dr)

Bloom Shape:
Double
Tea shaped

Flower Fragrance:
Very Fragrant

Bloom Time:
Blooms repeatedly

Habit:
Trained to climb

Patent Information:
Non-patented

Other Details:
Unknown - Tell us

Pruning Instructions:
Avoid pruning

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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to view:

By Paulwhwest
Thumbnail #1 of Rosa  by Paulwhwest

By Calif_Sue
Thumbnail #2 of Rosa  by Calif_Sue

By Calif_Sue
Thumbnail #3 of Rosa  by Calif_Sue

Profile:

No positives
2 neutrals
No negatives

Gardeners' Notes:

RatingAuthorContent
Neutral Joan On Jun 3, 2009, Joan from Belfield, ND (Zone 4a) wrote:


Editor's Note

Plant Patent number 387 has expired
Neutral Paulwhwest On Jun 7, 2004, Paulwhwest from Irving (Dallas area), TX (Zone 8a) wrote:

Bred in the United States.

Parentage:
Seed: Alpha x R. xanthina
Pollen: President Coolidge

Regional...

This plant has been said to grow in the following regions:

San Jose, California



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