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Clematis 'Royal Velours' produces an abundance of small, velvety, red-purple flowers that smother the deep green foliage from July to September to create a breathtaking display. An easy-to-care-for and fast-growing climber that is ideal for patio pots and obelisks, as well as for growing up walls and fences. Height: 4m (12'). Spread: 1.5m (5'). Pruning group: 3.