Clematis, Early Large-flowered Clematis 'Ken Donson'

Clematis

Family
Ranunculaceae (ra-nun-kew-LAY-see-ee)
Genus
Clematis (KLEM-uh-tiss)
Synonym
Spacing
8-10 ft. (2.4-3 m)
Hardiness
36-48 in. (90-120 cm)
Sun Exposure
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)
Danger
Full Sun
Bloom Color
Bloom Time
Blue-Violet
Sun Exposure
Hardiness
Bloom Color
Bloom Time
Bloom Time
Bloom Color
Bloom Time
Bloom Time
Bloom Color
Bloom Color
Bloom Time
Other Details
Other details
Mid Summer
Late Summer/Early Fall
Propagation Methods
Seed Collecting
Flower Fragrance
Patent Information
Bloom Shape
Pruning Groups
Bloom Diameter
Foliage Color
Bloom Characteristics
Water Requirements
Where to Grow
Seed Collecting
Fruit Shape
Fruit Size
Fruit Colors
Growing Habit
Days to Maturity
Seed Type
Disease Resistance
Leaf Type
Foliage Color
Bloom Characteristics
Water Requirements
Where to Grow
Other details
No fragrance
Propagation Methods
Soil pH requirements
Patent Information
Plant Size (check one)
Growing Habit
Growth Rate
Leaf Shape
Leaf Appearance
Degree to which the appearance is present
Leaf Texture (top)
Leaf Texture (bottom)
Leaf Color
Color of Leaf Margin
Leaf Substance
Number of Vein Pairs
Appearance of Margin
Margin Width
Flower Shape
Flower Fragrance
Does it set seed?
Flower Size
Flower Type
Blooming Habit
Foliage Habit
Color Patterns
Awards (if applicable)
Seed Type
Growth Habit
Single
Days to Maturity
Group 2 - Repeat bloomers; prune immediately after flowering
Awards (if applicable)
Bloom Shape
Other Details
Pruning Instructions
Kernel Color
Flower Shape
Flower Habit
Bloom Size
Color Pattern
Group
Large - 5 to 8 inches (12 to 20 cm)
Bloom Shape
Pruning Groups
Bloom Diameter
Heat (Pungency)
Fruit Shape
Fruit Size
Fruit Color
Disease Resistance
Seed Type
Flower Size
Size/Type
Flower Characteristics
Leaf Shape/Type
Leaf Texture
Leaf Color
Propagation
Pollination
Bearing Habit
Rootstock Vigor
Disease Resistance
Fruit Usage
Average Water Needs; Water regularly; do not overwater
Classification
Regional

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

Menlo Park, California

South China, Maine

Belgium, Wisconsin

Featured Videos

Gardener's Notes:

2
positives
1
neutral
0
negative
Sort By:
Sort By:
T
Belgium, WI (Zone 5a) | April 2007 | positive

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 y...Read More

M
M
Ewing, KY (Zone 6a) | September 2006 | neutral

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

E
E
| October 2004 | positive

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 b...Read More

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