Clematis, Late Large-flowered Clematis 'Ramona'


Family: Ranunculaceae (ra-nun-kew-LAY-see-ee) (Info)
Genus: Clematis (KLEM-uh-tiss) (Info)
Cultivar: Ramona
Additional cultivar information:(aka Hybrida Sieboldii Ramona, Ramona, Hybrida Sieboldiana)
Hybridized by Droog-Jackson & Perkins
Registered or introduced: 1888
» View all varieties of Clematis


Late Large-flowered


8-10 ft. (2.4-3 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)

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

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

Bloom Color:

Dark Blue


Flower Fragrance:

No fragrance

Bloom Shape:



Bloom Diameter:

Large - 5 to 8 inches (12 to 20 cm)

Bloom Time:

Late Summer/Early Fall

Sun Exposure:

Sun to Partial Shade

Other details:

Unknown - Tell us


All parts of plant are poisonous if ingested

Handling plant may cause skin irritation or allergic reaction

Pruning Groups:

Group 2 - Repeat bloomers; prune immediately after flowering

Patent Information:


Propagation Methods:

From softwood cuttings

From semi-hardwood cuttings

By simple layering

By serpentine layering

Seed Collecting:

N/A: plant does not set seed, flowers are sterile, or plants will not come true from seed

Foliage Color:

Unknown - Tell us

Bloom Characteristics:

Flowers are good for cutting

Water Requirements:

Average Water Needs; Water regularly; do not overwater

Where to Grow:

Grow outdoors year-round in hardiness zone


This plant is said to grow outdoors in the following regions:

Long Beach, California

Washington, District of Columbia

Buford, Georgia

Chicago, Illinois

Rockford, Illinois

Davenport, Iowa

Shawnee Mission, Kansas

Salvisa, Kentucky

Ellicott City, Maryland

Dracut, Massachusetts

Caledonia, Michigan

Saint Charles, Michigan

Wyoming, Minnesota

Brunswick, Missouri

Jackson, Missouri

Averill Park, New York

Flushing, New York

Hilton, New York

Southold, New York

Syracuse, New York

Brevard, North Carolina

Cincinnati, Ohio

Hamilton, Ohio

Richmond, Ohio

Dallas, Oregon

Grants Pass, Oregon

Portland, Oregon

Albion, Pennsylvania

Laurens, South Carolina

Pickens, South Carolina

Christiana, Tennessee

Copperas Cove, Texas

Manchaca, Texas

Willis, Texas

Salt Lake City, Utah

South Hero, Vermont

Leesburg, Virginia

Kalama, Washington

Ridgefield, Washington

Seattle, Washington

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Gardeners' Notes:


On Mar 7, 2016, coriaceous from ROSLINDALE, MA wrote:

This is usually treated as a class 3 clematis and cut back heavily in early spring, but it can also be treated as a class 2 and pruned lightly after the spring flush.

Flowers are blue-violet but not true blue. There are no true blue clematis.

Blackened crispy leaves are often due to a common fungal disease called clematis wilt. Large-flowered clematis are more prone to clematis wilt than the species and small-flowered hybrids.

Clematis and tomatoes are two exceptions to the usual rule, and are best planted 6 inches deeper than the soil level in the pot. This protects the stem... read more


On Jun 8, 2014, nwh from Chicago, IL wrote:

Huge lavender/blue flowers, blooms in late May/early June and then reblooms. Mine is growing on a chain link fence, in a strip of dirt between two sidewalks, where I haven't had much luck growing anything but weeds. I covered the roots with a rock. It is thriving.


On Jun 25, 2010, dicentra63 from West Valley City, UT (Zone 6b) wrote:

My best Clematis (of six that I have), Ramona is the most consistent performer with the biggest blooms and the most otherworldly shade of lavender-blue.

Definitely recommend. My soil is poor, and she's in part-shade, and she's happy as a clam at high tide.


On Jun 4, 2009, topofmurrayhill from Flushing, NY (Zone 6b) wrote:

I planted small specimens last year. This year they are quite vigorous and carefree growers, topping their trellises now in early June. Also very floriferous, with a terrific May spectacle of large flowers in striking blue/lavender shades covering the plants. I expect additional blooms later in the season. Very pleased with 'Ramona.'


On Feb 9, 2007, birder17 from Jackson, MO (Zone 6b) wrote:

I have seen this plant blooming prolifically. My son used the tiller on mine. I liked it so well, I bought another one.


On Feb 15, 2006, pkock from Springboro, OH (Zone 5b) wrote:

This clematis gives an outstanding display each May. It blooms sporadically thereafter all the way till winter. The seedheads are attractive year-round.


On Jul 17, 2005, Munkee1hk from Shirley, NY wrote:

I planted this type of Clematis earlier this spring, and it's doing so well. It has climbed up my trellis aon on to my fence. It's blooming profusly now. Definately a good vine for zone 7.


On Dec 11, 2004, sadie_mae from Central, KY (Zone 6b) wrote:

I love the color of this clematis the most during it's first few days, then it tends to fade; still pretty, I just prefer the new blooms. Has grown very well. It is in full sun, maybe the blooms wouldn't fade as much in partial shade.