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Clematis ‘Jackmanii’

Jackmanii’ has 5-6″ spectacular, dark, violet-purple, semi-nodding flowers with green stamens that are borne in great profusion from July to October. It is popular and reliable. This vine grows best in a fertile, well-drained, alkaline soil. A choice site is key to the success of establishing this perennial; roots should be kept cool and moist.

The Clematis performs best when sufficient moisture is given and the base of the plant is kept cool. Plant in a sunny location but cover the root zone with mulch or stone. Prune the first spring after planting to 6-12″ from the ground.

Clematis is a genus of over 250 species, most of which are woody to semi-woody deciduous vines climbing by twining leaf stalks or in some cases trailing over support, but in a few cases grow as freestanding or sprawling herbaceous perennials and small deciduous or evergreen shrubs. Most have flat, cupped or bell-shaped flowers. Some plants feature ornamental fluffy seed heads in autumn. Plants bear opposite, simple to compound leaves which are usually deciduous but sometimes evergreen. Compound leaves range from lobed to trifoliate to biternate to pinnate to bipinnate. Clematis is native to both the Northern and Southern Hemispheres including Europe, the Himalayas, China, Australasia, North America and Central America.

Availability

# Description Qty per Unit Units Available Price/Unit
Bulk
CL162BAG Clematis 'Jackmanii' 5 36 $26.75
Retail-Ready Packages
CL810000 Clematis Assortment 25 37 $106.25
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Plant Details +

Botanical Clematis x jackmanii
Common Name Jackman Clematis
Family Ranunculaceae
Size Root established in 2-1/2" square plastic pots
Height 8-12'
Spacing 4 feet
Hardiness Zones 4-9
Exposure Sun to partial shade
Foliage Leaves are opposite and widely spaced on thin vines with tendrils for entwining
Flower Dark, violet-purple flowers
Bloomtime June - September

General Information +

General Characteristics: Clematis may be planted and trained to cover walls, trellis, posts, fences, arbors or to cover rocky sites. It will need support. Prefers a rich, well-drained soil with a pH of 5.6-6.5. Clematis do best in neutral or slightly alkaline soils, but they are somewhat adaptable. If you have very acid soil, try to add some calcium when you plant. If you want to grow really good clematis you should incorporate a little lime in the planting holes. Roots should be planted in a cool moist environment, while the vine itself should be in the sun. Root area should be protected. They require 1" of water a week. Clematis 'Jackmanii' is possibly the best known Clematis in the world and is the best blooming Clematis in its family. 'Jackmanii' is the most popular large-flowered variety and it is very healthy and hardy.

Clematis Repeat Blooming: GROUP C: These are the late large-flowered cultivars and other clematis species. They flower in late June into August. These bloom on new wood from the current season so you don't need to maintain any old wood. They should be cut back to a living bud at about 24" from the ground in spring just as the buds swell. If you don't prune, the flowers will tend to be only up at the top of the plant and the bare stems will be unattractive below.

Planting/Care Instructions +

Planting Instructions: May be planted in any well-drained soil. Dig a hole large enough to encompass the roots without bending or circling. Set the plant in place so the crown (part of the plant where the root meets the stem) is about 1-2 inches below the soil surface. Cover with soil to the original soil surface and water thoroughly. The profuse flowering habit will provide a blanket of color over the area of choice.

Pests or Diseases: Deer Resistant and Resistant to Walnut Toxicity, Aphids, Clematis Borer, Stem Rot and Slugs