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Clematis, Early Large-flowered Clematis 'Rosemoor'


Family: Ranunculaceae (ra-nun-kew-LAY-see-ee) (Info)
Genus: Clematis (KLEM-uh-tiss) (Info)
Cultivar: Rosemoor
Additional cultivar information:(PP15797, aka Evipo002)
Hybridized by Evison-Olesen
Registered or introduced: 1997
» View all varieties of Clematis


Early Large-flowered


6-8 ft. (1.8-2.4 m)


24-36 in. (60-90 cm)


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:

Scarlet (Dark Red)

Flower Fragrance:

No fragrance

Bloom Shape:


Bloom Diameter:

Medium - 2 to 5 inches (5 to 12 cm)

Bloom Time:

Mid Summer

Late Summer/Early Fall

Sun Exposure:

Full Sun

Other details:

Unknown - Tell us


Unknown - Tell us

Pruning Groups:

Group 2 - Repeat bloomers; prune immediately after flowering

Patent Information:


Propagation Methods:

From woody stem cuttings

By simple layering

Seed Collecting:

Unknown - Tell us

Foliage Color:

Unknown - Tell us

Bloom Characteristics:

Flowers are good for cutting

This plant is attractive to bees, butterflies and/or birds

Water Requirements:

Requires consistently moist soil; do not let dry out between waterings

Where to Grow:

Suitable for growing in containers


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

, (2 reports)

Novato, California

Evergreen, Colorado

Mackinaw, Illinois

Bedford, Indiana

Saint Clair Shores, Michigan

Pittsburgh, Pennsylvania

Houston, Texas

Willis, Texas

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Gardeners' Notes:


On Sep 8, 2011, petalmeg from Pittsburgh, PA wrote:

This is my first and only clematis so far. Got it because of the long bloom time. It blooms beautifully for about a month, and then stops. Wondering if I need to amend the soil some how? Too much nitrogen? Any help appreciated. But at the end of the day - it is healthy, problem free, and gorgeous - so thumbs up!!


On May 4, 2007, shuggins from Houston, TX (Zone 9b) wrote:

I agree, it is slow to start, but worth the wait. My flowers are more purple than the picture, but fabulous. I purchased extremely small bareroot plants last year and they didn't really take off until this year.


On Mar 23, 2007, Shirley1md from Ellicott City, MD (Zone 7a) wrote:

Raised by Raymond Evison & Poulsen Roser A/S. Part of the Evison "Gardini" collection.


On Oct 28, 2006, JeanneTX from Willis, TX (Zone 8b) wrote:

A stunning Dark Red Magenta colored clematis with Yellow Anthers..slow to get established,COTW suggests it is a pruning group 2 but I am treating it like a pruning group 3 (Hard Prune)