Photo by Melody

PlantFiles: Clematis
Clematis 'Ken Donson'

Family: Ranunculaceae (ra-nun-kew-LAY-see-ee) (Info)
Genus: Clematis (KLEM-uh-tiss) (Info)
Cultivar: Ken Donson
Hybridized by Pennell; Year of Registration or Introduction: 1962

» View all varieties of Clematis

One vendor has this plant for sale.

One member has or wants this plant for trade.

Unknown - Tell us

8-10 ft. (2.4-3 m)

36-48 in. (90-120 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:

Flower Fragrance:
No fragrance

Bloom Shape:

Bloom Diameter:
Large - 5 to 8 inches (12 to 20 cm)

Bloom Time:
Mid Summer
Late Summer/Early Fall

Sun Exposure:
Full Sun

Other details:
Average Water Needs; Water regularly; do not overwater

Unknown - Tell us

Pruning Groups:
Group 2 - Repeat bloomers; prune immediately after flowering

Patent Information:
Unknown - Tell us

Propagation Methods:
Unknown - Tell us

Seed Collecting:
Unknown - Tell us

Click thumbnail
to view:

By elsie
Thumbnail #1 of Clematis  by elsie

By Eurogal
Thumbnail #2 of Clematis  by Eurogal


2 positives
1 neutral
No negatives

Gardeners' Notes:

Positive Twonewfs On Apr 26, 2007, Twonewfs from Belgium, WI (Zone 5a) wrote:

This clematis is a stunner. The deep blue blooms are about 7 inches across and it bloomed prolifically in my garden last year (it's 3rd year). It was mowed to the ground by deer/bunnies its first year, came back nicely, and was again (sadly) mowed to the ground last fall. It has enormous buds coming from what's left and I think I now see new growth coming from the ground, so I'm sure it will rebound, although I doubt it will bloom as well as last year, since much of the blooming is on old wood. This is a class B pruning code clematis. I grow it with a William Dafphin climbing rose and they make a stunning combination.

Neutral mystic On Sep 21, 2006, mystic from Ewing, KY (Zone 6a) wrote:

Received The Royal Horticultural Society, Award of Garden Merit (AGM) in 1993.

Positive elsie On Oct 10, 2004, elsie from Lafayette, NJ (Zone 6a) wrote:

This plant was blooming when I received it and I don't have any first hand knowledge of it.

The plant tag says to trim back in fall after hard frost or in spring before new growth appears.


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

Menlo Park, California
South China, Maine
Belgium, Wisconsin

We recommend Firefox
Overwhelmed? There's a lot to see here. Try starting at our homepage.

[ Home | About | Advertise | Media Kit | Mission | Featured Companies | Submit an Article | Terms of Use | Tour | Rules | Privacy Policy | Contact Us ]

Back to the top

Copyright © 2000-2015 Dave's Garden, an Internet Brands company. All Rights Reserved.

Hope for America