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 facades. Large, dark green leaves and 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; prune towards the end of the year to about 30 cm above ground. Refer to the shrub clematis general information for guidance on application, planting, suitable cable systems, etc..
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Lat: Clematis 'Praecox' is probably a hybrid of Clematis x jouiana and Clematis tubulosa var. davidiana