Bred around 1900 by Simon Louis Frères (France). This valuable variety has genes from Clematis vitalba which are responsible for its vigorous growth, with new shoots growing up to 4 metres per year. Grows as a dense groundcover, but is happy to climb up on trees, shrubs, fences, and façades. Large dark green leaves, small flowers (up to 2.5 cm) with narrow, white to light-blue petals. Flowers are abundant, and flowering period longer than 'Mrs. Robert Brydon,' from June to September (October). Not suitable for potting. A semi-perennial climber with little lignification, pruning towards the end of the year to about 30 cm above ground. Refer to the shrub clematis general information for guidance on application, location, suitable cable systems, etc..
(Lat: Clematis 'Praecox' is probably a hybrid of Clematis x jouiana and Clematis tubulosa var. davidiana)