The free flowering lilac blooms of clematis 39prince charles39 are fit for royalty this variety of old man39s beard which is a variety of clematis viticella is adorned with these delicate flowers from june to september its green foliage is equally attractive being both vigorous and compact this climber is perfect for growing in borders and containers or up fences walls and obelisks the rhs agrees having recognised the hardy climber39s fantastic performance with an agm 40