Floribunda, Hybrid Wichurana, Large Flowered Climbing Rose 'Blaze Improved'


Family: Rosaceae (ro-ZAY-see-ee) (Info)
Genus: Rosa (RO-zuh) (Info)
Cultivar: Blaze Improved
Additional cultivar information:(aka Blaze Superior, Demokracie, New Blaze, Improved Blaze)
Hybridized by Bohm
Registered or introduced: 1935
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Cluster-flowered (incl. Floribunda & Grandiflora)

Modern Climber


12-15 ft. (3.6-4.7 m)


6-8 ft. (1.8-2.4 m)


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)

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:

Dark red (dr)

Bloom Shape:


Flower Fragrance:

Slightly Fragrant

Bloom Time:

Blooms all year


Trained to climb

Patent Information:


Other Details:

Stems are moderately thorny

Pruning Instructions:

Blooms on new wood; prune early to promote new growth

Soil pH requirements:

6.6 to 7.5 (neutral)

Propagation Methods:

From woody stem cuttings

From softwood cuttings

From semi-hardwood cuttings

From hardwood cuttings

From hardwood heel 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:

Warrior, Alabama

San Jose, California

Denver, Colorado

Hampton, Illinois

Westchester, Illinois

Logansport, Indiana

Lansing, Kansas

Denham Springs, Louisiana

Danvers, Massachusetts

Brandon, Mississippi

Greenville, New Hampshire

Troy, New York

Rocky Mount, North Carolina

Harleysville, Pennsylvania

Rockwall, Texas

Olympia, Washington

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Gardeners' Notes:


On Apr 23, 2014, tearoses from Denham Springs, LA wrote:

After all these years I just figured out that this is the large red climber my parents grew on the huge trellis on the front of their 50's track house. Every spring my siblings and I would anxiously await on mom, scissors in hand, to cut each of us a bouquet for our elementary school teachers. Stems rapped with wax paper or aluminum foil so we wouldn't prick our little fingers. Silly huh? Well I now grow this rose and it bloomed for the first time. Memories. Ahh


On Jan 4, 2009, jess2132000 from Harleysville, PA wrote:

Blaze take a year or two to get going but its a lovely climber as it ages.. It can get some blackspot issues but alway blooms all summer for me. the best show is in June as this is when i took the photo of mine climbing our shed. I love this rose and its been in the group 5 years now!!!


On May 29, 2006, janders from Rockwall, TX wrote:

I put this rose against my house and people actually stop me to comment on them when I'm in my yard. Very beautiful, large clusters of blooms.


On May 21, 2005, Gindee77 from Hampton, IL (Zone 5a) wrote:

This is a great climber that has little die-back in my zone 5 garden. It blooms in flushes and is a great bright red color.


On Oct 20, 2004, trifunov from Brandon, MS (Zone 8a) wrote:

I bought this rose bare-root in spring, it took a long time to "wake up" and has only had a couple of blooms all season. Hopefully next year will be better.