A clematis from the viticella group clematis 39justa39 is a compact variety that is an ideal clematis for large containers with trellis the star shaped flowers are a pale lavender45blue with white stamens it is an easy to maintain climbing plant that can be pruned back to almost ground level each year and will grow again the following year it flowers from mid summer to early autumn height 15m 4053941 spread 1m 4033941 pruning group 3