Clematis vitacella 'Purpurea Plena Elegans'

Origin is vague possibly quite old ~1600's.  The flowers are small ~2", Dark magenta and fully double at all times.  Awarded the RHS Award of Garden Merit.   

Flowering period: Mid summer to early fall.

Habit: Hardy, vigorous, deciduous climbing vine.

Height: 10-13'

Exposure:  Full sun to part shade.

Site: Tolerates most garden soils. 

Recommended use:  Grow on a trellis, arbor, or against a wall or fence, separately or in combination with other plants.  Makes a good companion plant for roses.  Can be grown through small trees and shrubs.  Use with a light colored background to get the greatest contrast.    

Pruning:  (Group 3) This is perhaps the easiest group to prune.  It will bloom on the current season's growth every year.  Pruning is quite simple, cut every winter down to 12-18 inches above the soil. 

Watering:  Likes regular water. Soil should be moist but not wet.  Water deeply and then allow to dry some to encourage deep rooting.

Zones: 3-9.