Lat. Clematis viticella // diversifolia // tangutica // montana // vitalba // and others. The Clematis - also known as Old Man's Beard” or “Traveller's Joy” - are climbers especially appreciated for their flowers. There are differences between the robust wild or indigenous forms, their variations as well as the large flowered hybrids. Many species, hundreds of varieties.
Clematis viticella / diversifolia
Parents of many cultivars. Wild form reaches 5m height, flowers pink to violet during many weeks, very robust. Interesting for small espaliers are hybrids between Clematis integrifolia and C. viticella (“Clematis diversifolia”). Pruning Group 3, strong pruning required towards end of year, to approx. 20-60cm above ground.
Asian wild form, highly drought resistant and also suitable for full sun exposure. Long flowering time, filigree seed heads. Pruning Group 3, refer to C. viticella.
Robust species, gigantic growth habit, short flowering time in April. Suitable for larger areas. Pruning Group 1, no winter pruning, but cut back to thin out after flowering. For suitable wire rope systems see below.
Indigenous to Central Europe (and Africa), a “weed” Clematis, forms gigantic lianas, modest flowering with small white star-shaped flowers. Ornamental seed fascicles. Pruning Group 3, see C. viticella.
Depending on growth habit, usually close-meshed wire at 20-25cm intervals, for suitable growth support systems see below. Often as wire rope system 5050, also with solid rods. Light kits, for optimal development also Medium, if at risk of mildew and Clematis-wilt Heavy kit to allow greater distance from the wall.
A climber with leaf-tendrils. Growth depends on species and ranges from weak to extremely vigorous. Hybrids tend to be rather vigorous. Foliage from May to October, leaf drop of dried up leaves often slow.
Flower and Fruit
Depending on species / cultivars. Often beautiful filigree seed heads.
Three pruning groups: Group 1 and 3 see below. Pruning Group 2 includes most hybrids with large flowers, where all shoots are only minimally trimmed at the end of the year.
Semi-shaded to moderately sunny position, fresh humus-rich soil with good drainage, shade on the root zone is required. The large-flowered cultivars, except for Clematis diversifolia, are often susceptible to mildew and Clematis-wilt.