Data specific to Clematis (Edit)
Raised by: George Jackman
Country of Origin: England
Growing Zones: USDA Zone 4
USDA Zone 5
USDA Zone 6
USDA Zone 7
USDA Zone 8
USDA Zone 9
USDA Zone 10
USDA Zone 11
Plant Group: Jackmanii
Typical Plant Size: Typically 10 to 15 feet
Pruning Group: Group 3 - Hard pruning recommended in early spring
Bloom Diameter: Medium - between 4 to 6 inches
Bloom Color (Tepals): Deep Purple hue
Center Color (Anthers): Cream/White anthers
Bloom Shape: Single
Preferred Light: Tolerates partial shade
Prefers full sun
Moisture Requirements: Average moisture requirements
Additional Information: Free-flowering (very floriferous)
Recommendations: Good choice for beginners (easy to grow)
Good choice for shaded areas or northern walls
Good choice for hot climates
Awards: Royal Horticultural Society Award of Garden Merit

General Plant Information (Edit)
Plant Habit: Vine
Life cycle: Perennial
Sun Requirements: Full Sun to Partial Shade
Plant Height: 10-15 feet
Leaves: Deciduous
Flowers: Showy
Flower Color: Purple
Flower Time: Summer
Late summer or early fall
Resistances: Deer Resistant
Awards and Recognitions: RHS AGM
Child plants: 2 child plants

Image
Common names
  • Clematis

Photo Gallery
Location: Bea’s garden
Date: 2023-07-02
Location: My Garden, Arvada, Colorado
Date: 2008-07-11
Location: Zone 5
Date: 2015-06-07
Location: Bea’s garden
Date: 2023-07-02
Photo by victor
Location: My garden
Date: 2018-06-10
Photo by Cat
  • Uploaded by Cat
Location: Oxfordshire, England
Date: 2019-07-11
deservedly popular the world over
Location: Western NC
Date: May 22, 2014
  • Uploaded by vic

Date: 2020-11-06
6 petal
Location: Lincoln NE zone 5
Date: 2018-06-08
KODAK Digital Still Camera
Location: Millinocket, Maine
Date: 2022-07-06
First year here for Jackmanii
Location: Fairfax, VA | May, 2023
Date: 2023-05-08

Date: 2021-06-18
Location: My Gardens
Date: June 18, 2014
A Single Bloom
Location: My Gardens
Date: June 19, 2013
Close-Up View
Location: My garden
Date: 2023-06-01
Location: Zone 5
Date: 2013-06-16

Date: c. 1936
photo from the 1936 catalog, James I. George & Son, Fairport, New

Date: 2015-05-26
Location: My garden
Date: 2016-04-26
Photo by Seedsower
Location: Terrace garden left side.
Date: 2012-0622
Shown with sedum Angelina.

Date: 2018-07-02
Location: My garden
Date: 2023-06-01
Location: My garden
Date: 2023-05-30
Location: Backing up to 3 of the compost piles.
Date: 2005-0803
At this point it's so huge it has to get cut back.
Location: Harper post, full sun
Date: 2013-0317
Starting grow - see the leaf buds?

Photo courtesy of Joy Creek Nursery
Location: My backyard in Allentown, PA
Date: 9 November 2016
Jack, still working into November, producing a flower on a damp d
Location: My backyard in Allentown, PA
Date: 29 October 2106
Jack is still trying to produce flowers in late October.
Location: My Garden
Location: Cedarhome, Washington
Date: 2009-07-12
Location: Fairfax, Virginia (Outdoors)
Location: Chicago
Date: June
A seedling - unbelievable

The clematis blooms in this photo look like little pinwheels!
Location: Backing up to 3 of the compost piles.
Date: 2006-0701
Just one of very many blooms.
Location: Backing up to 3 of the compost piles.
Date: 2011-0702
Location: Harper post, full sun
Date: 2013-0623
In full bloom after having been cut back hard a few weeks previou
Location: Manitoba, Canada
Date: 2017-07-04
Location: My garden
Location: West Valley City, UT

Date: 2015-06-09
Location: Grapevine, Texas USA
Date: April 2021
Location: Louisville KY
Date: 2023-05-13
Vigorous climber with below average size blooms but prolific.
Location: Greenwood, MN
Date: 2014-07-16
Location: My Gardens
Date: June 19, 2013
Growing On Wire Fence
Location: In my yard in Holladay, UT
Location: In my yard in Holladay, UT

Date: 2020-11-05
4 petal
Photo by MaryDurtschi
Location: Brownstown Pennsylvania
Date: 2016-06-18
Location: Smithfield, KY
Date: 2008-06-13
jackmanii with zephirine drouhin rose
Location: Bordines Nursery, Rochester Hills, MI
Date: 2010-06-07
Location: Oxfordshire, England
Date: 2016-07-14
Location: My garden
Date: 2016-05-08
Location: Backing up to 3 of the compost piles.
Date: 2013-0713
Location: Harper post, full sun
Date: 2013-0529
I did mention it loves to invade the lantern, right?
Location: West Valley City, UT

Date: 2005-06-07
Credit Biraalo
Location: Iowa

Date: 2021-06-25
Location: Denton, Texas
Date: 2019-07-06
Clematis Jackmanii
Location: Silver Spring, MD
Date: 2014-06-16
Location: my garden
Date: 2014-06-30
Location: Lucketts, Loudoun County, Virginia
Date: 6/23/2010

Date: 2015-10-31
Location: Brownstown Pennsylvania
Date: 2016-06-19

Date: 2018-06-25
Location: Bordines Nursery, Rochester Hills, MI
Date: 2010-06-07
Location: Bordines Nursery, Rochester Hills, MI
Date: 2010-06-07
Location: Kenmore, NY  
Date: 6-29-2016
Location: Whidbey Island in Puget Sound, WA
Date: 13 July 2013
Great climber for pergola... Twists on self on its own. Performs

I believe this is one of the oldest cultivars grown. I am particu
Location: Backing up to 3 of the compost piles.
Date: 2006-0525
It was cut back to the ground in April and here you can see how m
Location: Backing up to 3 of the compost piles.
Date: 2006-0412
It's obviously time to cut it back...about two months late.
Location: West Valley City, UT
Location: West Valley City, UT
Location: Harper post, full sun
Date: 2013-0513
As it was preparing to invade the lantern, which is does too ofte
Location: My garden
Location: central Illinois
Date: 2014-08-16
Location: my garden 
Date: 2013-05-25

Date: 2015-06-09

Date: 2015-06-09

Date: 2015-06-09

Photo courtesy of Longfield Gardens
  • Uploaded by Joy

Photo courtesy of Longfield Gardens
  • Uploaded by Joy
Location: central Illinois
Date: 2015-10-13
Location: Grapevine, Texas USA
Date: March 28, 2020
Planted Spring 2019
Location: West Valley City, UT
Date: 2017-06-22

Photo Courtesy of Homestead Farms Nursery. Used with Permission.
  • Uploaded by Joy
Location: Gulf-coast Texas
Date: 2014-07-07
Growing in my roses and echinacea
Location: West Valley City, UT
Date: 2017-06-05
Location: central Illinois
Date: 2015-06-12
Location: central Illinois
Date: 2015-06-12
Location: central Illinois
Date: 2015-06-12

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Comments:
  • Posted by goldfinch4 (Ripon, Wisconsin) on Dec 19, 2011 3:23 AM concerning plant:
    Jackmanii was the first of the modern hybrid large-flowered clematis to be grown in gardens and it continues to be very popular today. Many sources list it as hardy to zone 4, but in a more protected location it has been known to be hardy to zone 3. Since it gets so large, a sturdy support or trellis will be needed. It will tolerate being planted close to black walnut trees. Does not do well in heavy clay soils.
  • Posted by Mindy03 (Delta KY) on May 9, 2012 3:20 PM concerning plant:
    Honey bees get white or cream pollen from this plant.
Plant Events from our members
piksihk On September 30, 2023 Bloomed
piksihk On May 1, 2022 Bloomed
piksihk On August 12, 2021 Bloomed
Both in ground and pot
piksihk On April 16, 2021 Bloomed
Back fence
piksihk On April 16, 2020 Bloomed
In ground finishing blooming - one in pot have few blooms
piksihk On April 19, 2019 Bloomed
HW back fence
piksihk On April 11, 2016 Bloomed
LlamaLlori On May 29, 2015 Bloomed
Is beginning to bloom, 'tan bella'
Catmint20906 On May 28, 2015 Bloomed
Richardis70 On January 29, 2016 Obtained plant
Set in hot bed.
FirmlyPlanted On July 4, 2017 Bloomed
FirmlyPlanted On May 14, 2012 Obtained plant
aspenhill On April 11, 2018 Obtained plant
Black Creek Greenhouse - qty 3
carlysuko On March 6, 2022 Obtained plant
Bought one of those bare root packages from Lowes. We shall see if it makes it. Definitely an impulse buy.
MissMew On July 13, 1993 Obtained plant
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