A fully double flowered clematis that will certainly impress you with its huge number of petals on each individual flower clematis 39diamantina39 sports blue45violet flowers from late spring through into early summer and will soon be amongst your favourite varieties of this amazing climbing plant plant it against walls or fences to cover them with a dazzling display or even get it to climb through a tree or large shrub to add extra interest height 300cm 401183441 spread 10