9 ideas for growing clematis

June 23, 2015

Queen of the climbers, clematis is prized for its long flowering period, the variety of flower shapes and colours, and its ability to thrive in a range of climates.

9 ideas for growing clematis

About clematis

Equipped with curling leaf stems, the vine will attach itself and rapidly grow through a lath or lattice trellis.

  • In some neighbourhoods, clematis is known as mailbox vine because it's such a popular choice for growing up a light trellis attached to a mailbox post.
  • Most people like to showcase clematis by growing it on its own trellis, but you can also let it gently twine its way through the branches of a shrub or small tree.
  • Colours range from pure white to deep purple to rich burgundy red.
  • Blossoms of the spring-blooming types can be as large as saucers, while the blooms of fragrant autumn clematis are less than 2.5 centimetres across.

1. Plant a dynamic duo

  • Plant two different varieties side by side for a spectacular bicolour show of flowers.
  • Or, to prolong the floral display, plant adjoining spring- and summer-blooming varieties so that you'll have flowers for months instead of weeks.

2. Be aware of a withering vine

If the foliage of your clematis withers and dies from a girdling stem canker at the soil line, it's a victim of a common disease: clematis wilt.

  • Remove and burn diseased stems, cutting well below the infected area. Plant new plants in a new location in moist, neutral, well-drained soil.

3. Train your clematis vine

In the spring, let your clematis cover—and beautify—a blank wall or fence by training it on a plastic-covered wire grid secured to the surface with nails.

  • Plastic-covered wire is preferable to bare wire, which can often heat up and burn the plant.
  • Position the wire at least one centimetre from the surface so the tendrils have room to twine.
  • For smaller wall spaces, a narrow-lath trellis makes a good support.

4. Prune at the right time

  • Clematis that flower in spring do so on the previous year's ripened wood and require only light grooming.
  • Late-blooming types flower on young wood produced the same year, and require a hard annual pruning in late winter or early spring.

5. Leave the vines in winter

For winter decoration, leave the feathery fruits on your clematis.

  • With the first frost or snow, the fruits will be transformed into dazzling little jewels. If you want to use them in a dried arrangement, cut them before they mature and fall from the plant.

6. Find a new use for an old umbrella

  • Slide the framework of an old umbrella into a metal pipe driven into the ground.
  • Plant two clematis at the foot of the frame. The flowering vines will quickly blanket it.

7. Spoil the soil your clematis calls home

  • Blanket soil around your clematis with an eight-centimetre layer of good compost every spring.
  • If your soil is naturally acidic, add a little lime to the mixture before spreading it on.

8. Feed a clematis baking soda

  • Give your clematis—and other flowering, alkaline-loving plants, such as delphiniums and dianthus—an occasional shower with a mild solution of 15 millilitres (one tablespoon) of baking soda in two litres (two quarts) of water.
  • They'll show their appreciation with fuller, healthier blooms.

9. Plant clematis in containers

  • Many small-flowered varieties make excellent container plants, although you need to provide them with a twig or wire trellis.
  • If you have a deck, try positioning the pot so the vine can find its way to the railing and spill over into a cascade of flowers.
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