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Jackmanii Superba Clematis

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  • Partial Shade to Full Sun (At Least 3 Hours Of Direct Sunlight)
  • Height 10 - 12 Feet
  • Width 2 - 3 Feet
  • Growing Zones 4-8

Clematis Jackmanii is one of the most well known clematis varieties. It was introduced in 1862 and the first late large-flowered hybrid clematis available to gardeners. The violet-purple flowering vine was named after the nurseryman George Jackman. Mr Jackman created the clematis hybrid by crossing it between clematis lanuginosa, clematis viticella, and clematis × hendersonii in 1858.

The dependable and hardy Jackmanii is still grown today as one of the most popular varieties in the United States. Jackmanii Superba Clematis is a newer improved version of the original Jackmanii, and has been bred for more attractive flower petals that are a deeper purple color than the original. The flowers will change from deep purple to a lighter lavender or violet color as the flowers get older.


Jackmanii Superba vs Jackmanii

Jackmanii Superba is considered an improved version over the original. This new plant has more profuse blooms and the flowers are slightly larger as well. We recommend growing the improved Superba variety over the traditional original jackmanii clematis.

Clematis Jackmanii Care

Caring for purple clematis jackmanii is extremely easy once established. The hardest part is getting the new plants established and the roots growing strong. This plant grows rapidly and does best in full sunlight locations that get at least 6 hours of direct sunlight. Try and choose a location where the “heads in the sun, feet in the shade”. Which means, the plant does best if the vines get direct sunlight, but the base of the plant is protected by some shade throughout the day.

The plants require well draining soil and hate wet feet, which can cause root rot and the plant to die if severe enough. We also recommend adding a layer of mulch at the base of the plant to help protect the roots and retain moisture.

Clematis Jackmanii bloom time goes from early summer and will rebloom throughout the fall until the first frost. In late fall, the flowers change to small, dry seed heads with silky tails.

We recommend providing support for clematis to grow on. It can be left to sprawl as a groundcover, but that is more difficult to do and harder to keep the plant healthy. The plants will grow by twining the leaves on any nearby support like walls, trees, shrubs, mailboxes or fences. The most common support is proving a metal or wooden trellis for the plant to climb on.

Pruning Clematis Jackmanii

Clematis Jackmanii are considered a group 3 clematis, which means the vine blooms on new wood, and the plants can be cut back hard in the late winter or early spring to within 6 inches of the ground. This is a fantastic way to clear out old growth and start fresh every year. The plant can climb up the old growth if you leave it, which can provide additional support if you choose not to trim the plant back.

Fertilizing Clematis Jackmanii

If you choose to fertilize jackmanii, use a balanced slow release fertilizer. Apply in spring, summer and fall if you wish. Keep in mind these plants prefer neutral soil. So an easy alternative to fertilizing is by adding high quality compost around the base each year, which will help maintain a healthy balance of nutrients. You can also get the soil tested if the plant is not looking healthy, to see if what needs to be added to the soil.

Clematis Jackmanii Plant Facts

USDA Hardiness Zones: 4-8
Flower Color(s): Violet Purple
Bloom Period: Summer to Fall
Foliage Color(s): Green
Exposure: Partial Shade to Full Sun
Height: 7-10 Feet Tall
Spread: 3-6 Feet Wide
Spacing: 3 Feet Center on Center
Habit: Climbing Vine
Blooms On: New Wood
Watering: Average
Soil: Well-Drained
Soil pH: Neutral
Shrub Type: Deciduous
Scientific Name: Clematis x ‘Jackmanii Superba’
Higher Classification: Leather Flower
Rank: Hybrid
Hybrid Parentage: C. lanuginosa × C. viticella
Cultivar Group: Clematis Viticella
Species: C. × jackmanii
Common Names: Clematis Jackmanii, Jackman Virgin's Bower, Jackman's Clematis

Other Clematis Jackmanii Questions

Are Clematis Jackmanii Evergreen?

No, these flowering vines are deciduous and not evergreen. Which means the leaves fall off each fall/winter around the first hard freeze. Each spring the plant will perennially grow new leaves.

What is the difference Between Clematis Jackmanii and Jackmanii Superba?

Jackmanii Superba is a new and improved version of the original clematis Jackmanii. The main differences are that Superba has slightly larger flowers and blooms more profusely than the original.

Do Jackmanii Clematis Come In Bulbs Or as Plants?

Clematis Jackmanii Vines do not grow as bulbs. These will typically be sold as small plants in containers about 3.5 inches tall or slightly larger 1 gallon containers. We are not aware of any clematis being grown as bulbs.

How long does Clematis Jackmanii bloom?

Clematis jackmanii will bloom from early summer and re-bloom until the first frost. In late fall the flowers will change to pretty silky seedheads.

Are Clematis Jackmanii Invasive?

The parent species is native to China and some clematis can be considered invasive. However, this plant is not considered invasive to anywhere that we are aware of.

Are Clematis Jackmanii Poisonous?

Yes! These plants have a high poison severity if any part of the plant is ingested, including the leaves, flowers, roots, sap, or seeds. Common symptoms include severe pain in the mouth, skin irritation, ulcers, salivating, vomiting, diarrhea. The toxin in the plant is protoanemonin.

Click here for more information on plant container sizes.

Plant Addict Guarantee (Included On All Plant Orders)

Plant Addicts guarantees your plant(s) will arrive happy and healthy, but the plant(s) are being shipped through the mail and accidents happen. If the plant is dead, has dried out roots or the incorrect item was shipped just notify Plant Addicts within 3 days upon delivery. We may ask for pictures but will try to make it as easy as possible for you. Please note plant(s) with damaged branches or wilted leaves will not qualify for this guarantee. Plants are very resilient and will rebound quickly when cared for correctly.

For information on how to care for you new plant please check out our guide. Guide: How to Care for Your New Plant(s)

Plant Addicts Warranty - 1 Year (Extra Purchase Required)

We encourage all plant lovers to purchase the Plant Addicts Warranty whether you’re new or an expert. There are many variables outside our control and yours that can cause the demise of your plant(s). Examples would be hungry animals, drought, poor soil conditions, over watering, disease, insects & many other factors. The Plant Addicts Warranty is a 1 year warranty protecting you from all the unknowns and will replace your plant if it moves on to the plant afterlife.

The warranty is purchased on a per plant basis and must be purchased at the same time as the plant purchase. We will cover 100% of the price of the plant but the warranty does not cover shipping cost. Simply let us know if your plant has died within one year of receiving it and we’ll get you a new one shipped out. We may ask for photos for documentation purposes but again we’ll try to make it as easy as possible.

For more information, please go to our Shipping & Returns page at the bottom of the website.

Guide: How to Care for Your New Plant(s)

Planter Shipping

Standard Colors: 2-3 business days

Special Order Colors: 8 weeks - this is due to the planter being custom made with the color(s) of your choice

Please Note: On special orders there can not be any cancellations

Plant Shipping

Time of Order:

Summer Shipping

  • If there is extreme heat we’ll delay shipping.  
    • We’ll have to review what areas the plants are traveling through along with your location

Once your plant is shipped you’ll receive an email with tracking information. Depending on the above criteria we’ll ship your plant(s) towards beginning of the following week from your order. We put together this helpful guide of what to do when you receive your plants in the mail.

It is important to know that all of our plants are clearly labeled for which growing zones the plant can survive in. The plants are thoroughly trialed and tested in every growing zone before we state the plant can grow in a zone. Again, our #1 priority is to ship the plants to you healthy and ready to thrive in your location. So we will do everything in our power to do so.