Jackmans Clematis (Clematis jackmanii) Hero ImgJackmans Clematis (Clematis jackmanii) Hero Img

Jackman's Clematis Plants

Clematis × jackmaniiFeefo logo

The details

Clematis × jackmanii

  • Deep purple flowers
  • Mild Scent
  • Flowers July - September
  • Type: Late large-flowered
  • Habit: Climber
  • Pruning group 3
  • Grows to 4m x 1m
  • RHS Award of Garden Merit
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£ 9.95

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Jackmanii Clematis Plants

Clematis x Jackmanii is an extremely popular variety. Wonderfully vigorous, it produces masses of sumptuous blooms throughout the summer. The velvety flowers are deep violet-purple with beautiful cream and wine-red anthers at the centre. It's a really versatile plant that copes brilliantly on a north facing wall or in a container.

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  • Flower colour: Deep purple
  • Flower shape: Large, open star, 4 - 6 petals
  • Fragrance: Mild scent
  • Approximate flowering season: July - September
  • Final height and spread: 4m x 1m
  • Type: Late large-flowered
  • Habit: Climber
  • Pruning group 3
  • RHS Award of Garden Merit

Great for your garden:

It looks wonderful when trained over a trellis or pergola, and because of its vigour can also be encouraged to climb up through trees.

Because it is so tolerant of shade, it makes it a great choice for a tricky area of the garden where other climbers may struggle. It is also suitable for growing in a container and can make a wonderful addition to a patio or balcony.

Did You Know? 

This is the first large flowered hybrid to be introduced here in Britain, in 1862. It was bred by the legendary nurseryman George Jackman from C. x diversifolia Hendersonii (which is a hybrid of C. integrifolia  and the wild, red form of C. viticella), and C. lanuginosa, which originated in China. There was a bit of spat in 1912 when William Robinson accused the variety of being a wild Japanese species, and while that does not seem to hold water, it is fair to say that the Jackmanii in cultivation today do not match the descriptions and drawings in the 1872 book by Moore and Jackman himself, The Clematis as a Garden Flower, as noted by the Dutch breeder, Wim Snoeijer.

It quickly became one of the most popular Clematis on the market, which it remains to this day.

Images supplied by Clematis on the Web.

Planting and Care Instructions

How to grow Clematis 'Jackmanii':

  • Likes partial shade and is particularly good for north facing aspects
  • Soil should be well drained, moist and fertile
  • Needs support through wires, trellis or frame
  • Works well planted with another vigorous climber such as a climbing or rambling rose - particularly good with the paler coloured and white blooms
  • Can be encouraged to scramble up through small to medium ornamental or fruiting trees
  • Can be planted in a large container in good quality compost, but must be fed regularly through growing season

Look out for:

As with all Clematis, aphids may become a problem. Spray if infestations get really bad.

May have some susceptibility to Clematis wilt. Avoid through mulching and deep root cultivation. Cut out infected stems and destroy immediately. Disinfect your tools after using.

Slime flux can occasionally be a problem. Damaged stems can be infected by the bacteria causing a foul smelling ooze from the affected area. Affected stems should be cut back to a healthy shoot, the infected material destroyed.