Clematis Pistachio - Clematis plant This Old man’s beard is a stunning climber that will enhance any garden. It grows to a height of 300cm (10’) and spreads to around 100cm (3’). Suitable for growing through other mature hedges and shrubs, this Clematis enjoys twirling along wires, growing up fences and along a trellis. Clematis Pistachio blooms from early Summer to early Autumn, it has interesting star-like flowers in pale cream with a delicate pistachio central stripe down each petal. This Clematis plant has a subtle charm it and elegance that cannot be overlooked. It enjoys growing in a sunny spot and would sit well on a patio in a container.