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Hybrid Kordesii Rose, Shrub Rose '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
Registered or introduced: 1981
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Cluster-flowered (incl. Floribunda & Grandiflora)

Modern Climber


4-6 ft. (1.2-1.8 m)

6-8 ft. (1.8-2.4 m)


36-48 in. (90-120 cm)


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)

USDA Zone 9a: to -6.6 C (20 F)

USDA Zone 9b: to -3.8 C (25 F)

Bloom Color:

Dark red (dr)

Bloom Shape:


Flower Fragrance:

No fragrance

Bloom Time:

Late Spring/Early Summer

Blooms repeatedly


Trained to climb

Trained on pillar

Patent Information:

Patent expired

Other Details:

Resistant to black spot

Resistant to mildew

Resistant to rust

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

Foliage Color:

Unknown - Tell us

Bloom Characteristics:

Unknown - Tell us

Water Requirements:

Unknown - Tell us

Where to Grow:

Unknown - Tell us


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

Grayslake, Illinois

Camden, Maine

Pekin, North Dakota

Sarver, Pennsylvania

Olympia, Washington

Gardeners' Notes:


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.


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.


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.


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

Canadian Explorer series rose.