User-friendly Clematis

Sunday, 05 December 2010

Clematis Venosa Violacea, a viticella hybrid

Do you love the ethereal beauty of Clematis flowers but are too scared to grow them: out of fear of mysterious wilts striking them dead, or the thought of complicated pruning techniques, or simply the expectation that they don't do well in your climate? Then take a look at the viticella hybrids, the easiest Clematis to grow in both warm temperate and cool climates.

Clematis Alba Luxurians, a viticella hybrid

The flowers of the viticella hybrids are smaller than some other types of clematis but they make up for this by their sheer profusion over a long period from late spring into early summer in warm temperate climates; they may even rebloom in early autumn. Their flowers also associate well with other garden plants, whereas the larger Clematis blooms sometimes seem like almost artificially unreal prima donnas. Viticella Clematis are robust, long-lived plants; are not subject to clematis wilt; and are easy to prune: simply hack back all the slender twining stems to about 30 cm above ground level in autumn or late winter. The flower shapes vary from cultivar to cultivar: there are nodding bells, open flat blooms, and even fully double forms. The stamens are often coloured in striking contrast to the sepals that make up the inflorescence.

Autumn reblooming of Clematis Etoile Violette, a viticella hybrid, in the garden of Chris Shale in Sydney

The original species Clematis viticella has nodding, bell-shaped mauve flowers, and hails from Southern Europe. It gave rise to a range of hybrids, many of them raised a century ago by French nurserymen. Favourites include 'Venosa Violacea' (single; white, veined and edged in rich purple); 'Alba Luxurians' (single; white with green tips); 'Etoile Violette' (single; deep purple-violet); 'Betty Corning' (single; bell shaped; pinkish-blue); 'Kermesina' (single; deep red) and 'Purpurea Plena Elegans' (double; dusky reddish-purple).

Clematis viticella growing through Eupatorium Chocolate

Give your plant a good start in life with lots of organic matter and ample water in its first two years whilst it establishes its strong root systems; after that it can cope with some dryness. Like all Clematis, the viticella hybrids prefer a well-drained position where their roots are in cool shade but where the stems can grow into sunshine. Flat stones placed around the root area can provide shade, as could a low-growing shrub planted nearby. Annual applications of a balanced fertiliser and organic mulch in late winter will keep the plant flourishing. Protect new shoots from snails and aphids.

The lightweight vines rarely exceed 3 - 4m in height and pruned annually, will never get out of control. They love to scramble through shrubs or small trees: choose a host which is either pruned at the same time as the Clematis - such as a Buddleja, shrubby Salvia, or a rose -or something which doesn't generally require pruning. They can twine through a scrambling rose or other climber on an arch, lattice or veranda post, or behave like a groundcover, weaving themselves across low growing perennials to provide an exotic garland. The darker coloured forms look particularly effective if grown through a silvery leaved host, such as Buddleja 'Lochinch' or Helichrysum petiolare. Purple or blue flowered cultivars are stunning grown through gold or lime leaved plants, such as Duranta 'Sheena's Gold' whilst red forms associate well with purple foliage shrubs such as Berberis.

The best place to find these plants is at a specialist clematis nursery, and these usually have mail order facilities. Try these: Clematis Cottage Nursery and Alameda Homestead Nursery.

Reader Comments

  • By Robin 2121 Monday, 06 December 2010

    You make it sound so easy, Deirdre! Although I am tempted to try to grow a clematis after all this Spring rain.Thank you for inspiring us all in 2010 and keeping us down to earth during the silly season. Robin

    Thanks, Robin. I think these are worth a try! Deirdre

  • By gillian 2121 Monday, 06 December 2010

    Hi, I am almost tempted to try and grow these beautiful plants again. The last time it survived for about a year and that was that. It sounds sooo easy. Thank you once again. th wild garden Gillian

    I have never been able to grow the big-flowered ones but these ones definitely seem more amenable to our conditions. I have seen some gardens where Clematis are grown quite successfully in large pots. Plenty of water in spring and summer seem to be a key to success. Deirdre

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