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Clematis ×jackmanii

Scientific Name: Clematis ×jackmanii

Family: Ranunculaceae

Category: Dicot

Growth: Subshrub, Forb/herb

Duration: Perennial

Other Names:

       

Clematis 'Jackmanii'

Clematis 'Jackmanii' is a popular and long-cultivated clematis cultivar, known for its profusion of velvety blooms. It's a widely grown vine, prized for its vibrant flowers and vigorous growth habit.

Considerations for Pets and Children

  • This plant is a vine, so may have a potential climbing or tripping hazard depending on the installation.

Common Names

  • Jackman's Clematis
  • Old Man's Beard

Taxonomy and Nomenclature

  • Scientific Name: Clematis x jackmanii
  • Cultivar Name: 'Jackmanii'
  • The cultivar 'Jackmanii' is named after the 19th-century British nurseryman.
  • Other cultivar names mentioned include: Jackmanii Alba, Blekitny Aniol, Comtesse de Bouchaud, Jackmanii Superba, Nelly Moser, Elizabeth.
  • Clematis x jackmanii is a hybrid.

Distribution and Habitat

  • Clematis 'Jackmanii' was introduced in 1858 (or 1862, according to other sources) by Jackmans nursery of Woking, England.
  • The plant was brought to England in the 1850's
  • It is widely grown throughout gardens.

Morphological Characteristics and Growth Habits

  • A large-flowered clematis, with flowers typically 5-6 inches in diameter.
  • Flowers from June to September (or October).
  • Flowers can have 4, 5, or 6 petals (or sepals).
  • Flower color is typically a solid deep purple (or deep velvet-purple), sometimes with a reddish bar when first open that fades over time.
  • Features prominent, creamy-yellow stamens.
  • Some varieties have flowers with paler veins and bars.
  • Grows to a height of around 3 meters.
  • It exhibits a vigorously climbing growth habit.
  • Pruning group 3.

Cultivation

  • Easily grown in fertile, medium moisture, well-drained soil.
  • Prefers full sun to part shade. While clematis generally prefer full sun, this cultivar tolerates partial shade well.
  • Plant in rich, fertile soil, and shade the roots from the sun.

Quirky Facts

  • Clematis 'Jackmanii' was the first of the modern large-flowered hybrid clematises of gardens.
  • It is described as the most popular and reliable of the Clematis vines, often considered the all-time favorite.

Interactions with Other Organisms

  • Subject to mildew in some conditions.

Further Information

  • RHS (Royal Horticultural Society)
  • Dave's Garden