Woody > Clematis > Clematis × jackmanii > Clematis × jackmanii
Clematis × jackmanii
Origin: Hybrid, created in Surrey, England. Created from merging two Clematis together. The species name is in reference to George Jackman, a British nurseryman
Mike's
Opinion
"
A very attractive looking vine with showy purple flowers combined with its bright green foliage. Its tolerance of colder weather make it better for winter than most other vines. They look pretty in bloom in early summer and work well in gardens when planted near other shrubs. Also looks good when it is combined with other plants in the landscape.
Michael Pascoe, NDP., ODH., CLT., MSc. (Plant Conservation)
"
| Family |
| Ranunculaceae |
| Genus |
| Clematis |
| Species |
| × jackmanii |
| Category |
| Woody |
| Type |
| Vine |
| USDA Hardiness Zone |
| 6 |
| Canadian Hardiness Zone |
| 5a - 5b |
| RHS Hardiness Zone |
| H7 |
| Temperature (°C) |
| 13 - 16 |
| Temperature (°F) |
| 55 - 60 |
| Height |
| 4 m |
| Spread |
| 0.3 m |
Photographs
Cultivars
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Description and Growing Information
Flowering Period
| General Description |
| A medium sized vine in which its stems can grow well around walls and fences. Has pinnately compound leaves and has a distinct violet-purple coloured flower. It can tolerate colder temperatures compared to other vines, making it more suitable in the winter. |
| Landscape |
| he bright green leaves make the vine a good screen choice for covering a side of a house. Can also use the vine in gardens, as their fragrant purple coloured flowers will provide contrast in the landscape. The Clematis can also be used to grow above other plants in a garden. The stem of the Clematis makes it an excellent choice for walls, arbours, and trellises. Great for screening any eyesores in your landscape. Growing them in pots can also be effective, as it can provide a screen without having to stick it in a flower bed. |
| Cultivation |
| Prefers loamy, moist, well-drained soil. Thrives in part-shade to full sun. Best to avoid extremely hot and sunny temperatures as the roots prefer to be in a cooler environment. Prefers neutral pH of 6 - 7.5. The Clematis should be pruned regularly to avoid the stems getting tangled up with each other. The best time to prune them is over the winter before new growth starts next season. |
| Shape |
| Can grow into various shapes depending on how it is pruned. Clematis generally grow upward if used as a screen for a wall or fence. You can get a taller Clematis or a wider one depending on where you decide to use it in the landscape |
| Growth |
| Slow |
| ID Characteristic |
| Woody, deciduous vine that is identified by its bright, violet-purple coloured flowers. It has opposite, pinnately compound leaves with 5 to 7 leaflets. All parts of the plant are poisonous to humans. Grows in part shade to full sun, shade for the roots, sun for the plant. |
| Pests |
| Some common pests for the Clematis include the Clematis borer, as well as scale, whitefly, and leaf miner. The Clematis is also susceptible to many diseases including leaf spot, stem rot, wilt and powdery mildew. All parts of the Clematis are poisonous, and it can cause severe skin irritation. |
| Habitat |
| Horticultural origin. |
| Bark/Stem Description |
| Like most vines, the stem on the Clematis is thin. The stem has a light brown colour that can wrap around various sized objects, thus making it great for walls and trellises. |
| Flower/Leaf Bud Description |
| Small sized leaf buds, could not find a specific size. The colour for the buds is also unknown. Scales on the bud are exposed and are usually in pairs from 1 to 3. |
| Leaf Description |
| The leaf size of the Clematis ranges from 2 to 12 cm. Has oppositely arranged leaves that are pinnately compound and ovate shaped with smooth margins. Has a bright green coloured leaf. Slight pubescence on the leaves. Has arcuate leaf venation. |
| Flower Description |
| Violet-purple coloured flower that blooms in June/early summer. Roughly 10 to 18 cm in diameter. Has showy sepals that give the flower the violet-purple colour. The number of sepals range from 4 to 6 and grow out to each corner of the flower. The inflorescence is a cyme shape, and is yellowish-brown in colour. |
| Fruit Description |
| The fruit on the Jackman Clematis is an Achene, which is small, roughly 2 cm in length, and carries only one seed. It is silver coloured. |
| Colour Description |
| The bark on the stems are light brown. The sepals on the flower are violet-purple, and the inflorescence blooms a yellowish-brown colour. The leaf is a bright green that remains throughout the seasons. The Achene fruit is silver coloured. |
| Texture Description |
| Has a medium texture and stays relatively the same throughout the seasons. |
| Propagation |
| The best way to propagate the Clematis is by cuttings. The best time to start propagation is in early summer, during its flowering period. The first thing to do is to cut a healthy stem off the vine and adding root hormone to the bottom of it. It is best to keep the Clematis in indirect light during the rooting process, which takes approximately 1 to 2 months. Once the plant has finished rooting, you will want to cut back some of the stems to encourage it to grow out more. When cutting back, the ideal amount is 30 cm. Adding fertilizer will also help. |
| Ethnobotanical Uses (Disclaimer) |
| Used in the landscape today mostly for their flowers. The Clematis, like most vines, is used traditionally as screens for covering large walls on houses and buildings that people don’t want to be seen. Doing this takes away the eyesore in the landscape and instead adds a more appealing look. This vine is also used currently in many gardens as well, blending in well with shrubs and other perennials. |
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