Clematis, Late Large-flowered Clematis 'Ernest Markham'


Family: Ranunculaceae (ra-nun-kew-LAY-see-ee) (Info)
Genus: Clematis (KLEM-uh-tiss) (Info)
Cultivar: Ernest Markham
Hybridized by Markham
Registered or introduced: 1937
» View all varieties of Clematis




10-12 ft. (3-3.6 m)

12-15 ft. (3.6-4.7 m)

15-20 ft. (4.7-6 m)


4-6 ft. (1.2-1.8 m)

6-8 ft. (1.8-2.4 m)


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)

Bloom Color:

Magenta (pink-purple)

Scarlet (dark red)

Flower Fragrance:

No fragrance

Bloom Shape:


Bloom Diameter:

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

Bloom Time:

Late Spring/Early Summer

Mid Summer

Late Summer/Early Fall

Sun Exposure:

Full Sun

Sun to Partial Shade

Light Shade

Other details:

Unknown - Tell us


Unknown - Tell us

Pruning Groups:

Group 2 - Repeat bloomers; prune immediately after flowering

Patent Information:

Unknown - Tell us

Propagation Methods:

From herbaceous stem cuttings

From woody stem cuttings

From softwood cuttings

From semi-hardwood cuttings

From hardwood cuttings

By simple layering

By tip layering

Seed Collecting:

Bag seedheads to capture ripening seed

Collect seedhead/pod when flowers fade; allow to dry

Allow pods to dry on plant; break open to collect seeds

Allow seedheads to dry on plants; remove and collect seeds

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:

Unknown - Tell us

Water Requirements:

Average Water Needs; Water regularly; do not overwater

Where to Grow:

Unknown - Tell us


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

Long Beach, California

San Leandro, California

Solvang, California

Marietta, Georgia

Marshalltown, Iowa

Caledonia, Michigan

Trenton, Michigan

Circle Pines, Minnesota

Minneapolis, Minnesota

Red Wing, Minnesota

Columbia, Missouri

Helena, Montana

Syracuse, New York

Delaware, Ohio

Ravenna, Ohio


Allentown, Pennsylvania

Lansdowne, Pennsylvania

Summerville, South Carolina

Christiana, Tennessee

Galveston, Texas

Paris, Texas

Willis, Texas

Ames Lake, Washington

Redmond, Washington

Union Hill-Novelty Hill, Washington

Hales Corners, Wisconsin

Mc Farland, Wisconsin

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Gardeners' Notes:


On Jun 7, 2011, kentstar from Ravenna, OH (Zone 5b) wrote:

Had this one in the ground now for two years, no blooms yet! I have pruned hard the last couple years so we'll see if I get any this fall?

Ernest now blooms beautifully every year! The last couple of years I tried pruning as a group 3 which works very well. This year I am experimenting with pruning as a group 2. We'll see what happens! May 2014


On Sep 25, 2006, Rachele from revelstoke,
Canada wrote:

i have grown many types of clematis over the years & have never had a problem with them flowering. This is the third summer Ive had this one, pruned it hard early spring, its roots are shaded it grows like crazy but has never had one bloom, Any suggestions? Thank-you! Rachele


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

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


On Jul 3, 2006, RavenCroft from Jordan, NY (Zone 6a) wrote:

Love this clematis! Mine is a vivid, intense magenta & the blooms are huge, 5 - 6". Growing to almost 15 feet here (Syracuse, NY, zone 5) it likes a bit of a raised bed for good drainage, but needs routine watering. Never had any wilt problems & I've had it about 9 - 10 years now. Blooms profusely starting in mid to late June in my area & continues thru August. Then, when I think my garden is almost at an end for the season , Ernest Markham will gives me a last hurrah of the summer in September. Blooms aren't quite as big, but it is still very showy. No pest problems or diseases noted.


On Jul 30, 2005, Marlina from Blaine, MN (Zone 4b) wrote:

I have two of these blooming for the first time. I planted them this spring. I am slightly disappointed in that they look so much like Villa De Lyon I just hope they weren't mismarked....I already had several of the other ..very pretty though


On Jul 11, 2005, StarGazey26 from (Zone 10a) wrote:

I love this clematis, it is very very nice, and has a big flower, very showy along with my Clematis, Jan Pawell II, I think thats how u spell it? They both are beautiful. I will post some pics of Ernest when he blooms again! Very fast grower too.