Branched stems bear opposite, lance-shaped leaves. Clusters of star-shaped deep rose-pink flowers, each petal deeply cut into 4 narrow segments, appear in late spring & early summer. Little maintenance is required. Trim just above the water surface after foliage has died back in autumn to tidy. Flowers May-August. Minimum height 60cm; maximum height 100cm. Maximum depth 10cm. Native. Slow growth rate. Supplied in a 1 litre pot.