Photo by Melody

PlantFiles: Large-flowered Climbing Rose
Rosa 'Dublin Bay'

Family: Rosaceae (ro-ZAY-see-ee) (Info)
Genus: Rosa (RO-zuh) (Info)
Cultivar: Dublin Bay
Additional cultivar information: (aka MACdub, Climbing Dublin Bay)
Hybridized by McGredy; Year of Registration or Introduction: 1975

» View all varieties of Roses

2 members have or want this plant for trade.

Modern Climber

6-8 ft. (1.8-2.4 m)
8-10 ft. (2.4-3 m)
10-12 ft. (3-3.6 m)

4-6 ft. (1.2-1.8 m)

USDA Zone 4a: to -34.4 C (-30 F)
USDA Zone 4b: to -31.6 C (-25 F)
USDA Zone 5a: to -28.8 C (-20 F)
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)

Bloom Color:
Medium red (mr)

Bloom Shape:

Flower Fragrance:
No fragrance

Bloom Time:
Late Spring/Early Summer
Blooms repeatedly

Trained to climb

Patent Information:

Other Details:
Resistant to black spot
Resistant to mildew
Resistant to rust
Stems are moderately thorny

Pruning Instructions:
Blooms on new wood; prune early to promote new growth
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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There are a total of 12 photos.
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1 positive
1 neutral
No negatives

Gardeners' Notes:

Positive etherealsunshin On Jun 11, 2012, etherealsunshin from Wyanet, IL wrote:

I have this in a semi-shady spot and it tends to lean its blooms toward the north where it can soak up the afternoon sunset. It has beautiful, delicately petaled blooms in a dark true-red (no pink roses in my beds!!!). The flowers are very lightly scented and medium to large sized in its shady spot. This also gets northern exposure, so I wrap in straw and burlap for winter in zone 5a. I had to cut it to 12" two springs back after a brutal -20 (without windchill) winter, but I had zero dieback after our mild 2011-12 winter. It does seem like it would be semi cane-hardy in a normal zone 5 winter, but I baby it since it was a spindly little whip that survived a lot of abuse its first year (its sister didn't survive the cat's taste-test).
The canes are a bit leggy at times and take a while to thicken up, but I have not done any significant pruning except dead wood...I don't mind if canes cross or are spindly, as a rampant look is preferable to me. I'm surprised that the PlantFiles reports not to prune...not sure why, but that's what I'm doing :) Also, the thorns are not "moderate"--these suckers are pretty thorny and the thorns are smallish and very very sharp! I have been stuck a few times while training it to its trellis and it has shredded its own leaves with the thorns in strong winds if it has unsecured canes.
My Dublin Bay is a respectable, but not a profuse bloomer (the canes aren't drooping from the weight of the blooms like my Don Juan), but only gets about 6 hours of afternoon sun/maybe 8 in high summer. It will rebloom sporadically all summer. Even so, it seems shade tolerant and the flowers are so classically shaped and such a beautiful bright red (no pink!!) that it's a point of pride in my garden.
I selected this variety because it is very hardy and I'm darn picky about roses' shape and color. Spray for insects, as japanese beetles feasted on this and the adjacent flowering plum shrubs last fall.

Neutral Paulwhwest On Jun 4, 2004, Paulwhwest from Irving (Dallas area), TX (Zone 8a) wrote:

Bred in New Zealand. Won the following awards:

Auckland Rose of the Year 1993
Award of Garden Merit in 1993
Best Climber 1992
Climber twenty four times from 1999-2001
Polyantha Spray from the Medford Rose Society in 2000

Seed: Bantry Bay
Pollen: Altissimo


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

Redding, California
Grayslake, Illinois
Wyanet, Illinois
Alexandria, Louisiana
Lawndale, North Carolina
Paris, Texas

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