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General information on clematis hybrids

Large-flowered hybrids are the best known representatives of the species clematis.They are appreciated for their magnificent, large flowers (significantly larger than 10 cm in diameter) and for their long flowering period. There are hundreds of cultivars, most of whom are quite fragile and prone to disease. These "hybrids" can ornate facades as they grow up to 3 meters in height. Available sorts can be found in the overview.

Flowering clematis hybrid (the classic clematis "Jackmannii")

Requirements / Price

Don't plant against a hot southeast or west oriented walls, these clematis prefer a partially shaded location. Many cultivars such as "Dr. Ruppel" and "Nelly Moser" even need full shade. The location must be wind protected and the stem foot shaded. The soil should be fresh and drained - standing water must be avoided at all costs! The planting distance between clematis should be between 0.5 and 1.5 meters. When planting, position the roots at 10 cm below the surface. Choose pot that is at least 12 litres. In the overview you can select between available varieties and prices.

Caracteristics and Pruning

Clematis are frost-resistant and perennial leaf-stalk twiners, with medium to weak growth strength. The leaves develop from May to October, the foliage is not very dense. Growth height is anywhere between 2 to 4 meters. Flowers open in May / June. If the flowers are consistently cut off and the soil is fertilized, there might be a second flowering in August / September. There are beautiful seeds in autumn, but the old leaves don't really fall off by themselves and need to be cut. Cut all shoots at half lenght at the end of the year.

Large-flowered clematis hybrids are prone to mildew and clematis wilt. Mildew can be prevented by choosing healthy cultivars and a good planting spot. Proper watering is crucial: the leaves should never get wet just as with tomatoes. On the dreaded clematis wilt: all varieties that will flower multiple times and those that flower early are more vulnerable as late summer bloomers such as "Ernest Markham".

Wire rope trellis for clematis

Grid pattern with narrow meshes from 20 to 30 cm. There should be more vertical lines, so that the mesh is shaped in standing rectangles instead of squares. There is a table of suitable rope systems at the bottom of the page. Our wire rope trellis design 5050 with steel rods is a good choice, in the simple and light versions or in the medium range for optimal deployment. Heavy / massive designs are further away from the wall and can be chosen if the risk of mildew is high.

Suitable wire rope trellis?

Click on the image to see wich designs are adapted as a growing aid for mandevillas.

Hybrid with large flowers on a wooden trellis
Clematis hybrids on a wood espalier
Blooming large flowered clematis hybrid
Clematis plant on a wire rope trellis in Medium design range

Wire rope trellis for large-flowered clematis

Please click on the graphics to see a detailed view of each design!

  = suitable         = sometimes suitable       = not suitable