From the viticella group, Clematis 'Justa' is a delightfully compact variety that is perfect for growing in large containers. The pale lavender-blue, star-shaped flowers contrast beautifully with the central boss of white stamens. Flowering from midsummer to early autumn, this reliable variety is particularly easy to maintain as it can be cut back to almost ground level each year. Height: 1.5m (5'). Spread: 1m (3'). Pruning group: 3.