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PlantFiles: Hybrid Kordesii Rose, Shrub Rose
Rosa 'Quadra'

Family: Rosaceae (ro-ZAY-see-ee) (Info)
Genus: Rosa (RO-zuh) (Info)
Cultivar: Quadra
Additional cultivar information: (PP09995, Explorer series; aka J.F. Quadra)
Hybridized by Ogilvie/Svejda; Year of Registration or Introduction: 1994

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2 members have or want this plant for trade.

Cluster-flowered (incl. Floribunda & Grandiflora)
Modern Climber

4-6 ft. (1.2-1.8 m)

36-48 in. (90-120 cm)

USDA Zone 3a: to -39.9 C (-40 F)
USDA Zone 3b: to -37.2 C (-35 F)
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)

Bloom Color:
Medium red (mr)
Dark red (dr)
Red blend (rb)

Bloom Shape:

Flower Fragrance:
Unknown - Tell us

Bloom Time:
Late Spring/Early Summer
Mid Summer
Late Summer/Early Fall
Blooms repeatedly

Trained to climb

Patent Information:

Other Details:
Resistant to black spot
Resistant to mildew

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 linjasar
Thumbnail #1 of Rosa  by linjasar

By linjasar
Thumbnail #2 of Rosa  by linjasar

By DonnaMack
Thumbnail #3 of Rosa  by DonnaMack

By sazzyrose
Thumbnail #4 of Rosa  by sazzyrose

By DonnaMack
Thumbnail #5 of Rosa  by DonnaMack

By DonnaMack
Thumbnail #6 of Rosa  by DonnaMack

By Glenn3
Thumbnail #7 of Rosa  by Glenn3


3 positives
1 neutral
No negatives

Gardeners' Notes:

Positive Glenn3 On Jul 10, 2010, Glenn3 from Camden, ME wrote:

Totally hardy in zone 5a; one of the best red climbers for our climate. Handsome bloom with old-fashioned muddled center. The color is dark red for us (cooler climate?), with a faint fragrance. Also known as 'J. F. Quadra,' it is a Kordesii bred in Canada, with complex parentage. One report I saw elsewhere said it was a bit prone to the usual rose diseases, but it hasn't developed any serious afflictions for us.

Positive DonnaMack On Jul 19, 2007, DonnaMack from Elgin, IL (Zone 5a) wrote:

Superb for training to a structure. The stems start off soft (including soft and flexible thorns that do not penetrate the skin) and then harden. Essentially ever blooming, it forms new branches while continuing to produce flowers. The first year is a bit slow but it takes off in the second. Seems to require minimal fertilization. Blackspot free, mildew free and does not attract japanese beetles or aphids. So tough that it can be left on an exposed trellis in zone 5a. The first of my roses each season to start to grow, with no dieback. Alas, no scent, but as the season progresses the flowers actually get larger (three inches plus). The closest thing to a care free rose.

Positive linjasar On May 7, 2007, linjasar from Upper Saint Clair, PA (Zone 6a) wrote:

I love this rose! It is a climber for me and 8ft tall. It only receives a 1/2 day of sun and it blooms well. Large, full flowers and very healthy. It does repeat for me. No dieback at all in z5a.

Neutral Redkarnelian On Nov 7, 2006, Redkarnelian from Newmarket, ON (Zone 5a) wrote:

Canadian Explorer series rose.


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

Grayslake, Illinois
Camden, Maine
Pekin, North Dakota
Sarver, Pennsylvania
Olympia, Washington

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