Hybrids with flower diameters of about 10 cm are regarded here as a separate clematis group-- the 'middle-sized clematis.' Their magnificent flowers are just as beautiful as those of the large-flowered hybrids, and the flowering lasts longer. According to the rule of thumb "the smaller the flower, the more robust the plant," these clematis hybrids are also less susceptible to disease and less maintenance-intensive, and therefore often better suited as façade plants. In this sense, they are a transition to the clematis viticella group. Please note that while some of these clematis only need a small trellis, some can grow to over 4 metres in height.
These clematis thrive in partial shade; avoid hot southeast or west facing walls! They require humus-rich, fresh, well-drained soil with no standing water, as sheltered from the wind as possible. The trunk base must be in shade. Plant them 1 - 2.5 m apart and position the root ball 10 cm below ground level. Use a 12 litre pot if you are potting the plant. The available varieties can be found in the overview.
These frost-resistant clematis are perennial stem tendril twiners (petiole climbers). They grow with moderate vigour, with foliage from May to October, up to about 5 m in height and often just as wide. Flowering can be prolonged when the faded flowers are cut to prevent the development of seeds; the clematis will respond by opening new flower buds. The seeds are beautiful in autumn, but the withered leaves don't detach by themselves... for this reason, it is best to make the main cut at the end of the year (in autumn). Cut the stems down to approx. 20 - 60 cm above the ground (prune according to "pruning group 3"). The medium-flowering hybrids are less susceptible to mildew than those with larger flowers. The varieties that carry a lot of the viticella heritage are healthiest.
For these clematis, choose a tightly arranged (closely-meshed) pattern with a 25 cm to 35 cm grid, with vertical axes dominating so that the shape resembles "standing rectangles" rather than squares. See the bottom of the page for a table with suitable designs. Our wire rope trellis 5050 with steel rods is a good choice. Easy systems ("Basic" and "Basic-S"), as well as "Mini" or Light can be used, but the medium range allows optimal development of the plants, especially if mildew or clematis wilt are an issue. The heavy / massive design ranges give the plant more space with a bigger distance to the wall, which helps prevent clematis wilt and mildew.