Our friends from Sinclair (The Pharoah of Foamflowers) Adam Dunvegan Nursery, this is rated as one of the most vigorous of the genus. A strong grower with glossy, rugose leaves and excellent bronze fall and winter color. Bold, creamy white flowers persist for 6 to 8 weeks, a robust clump former with some short runners in spring and fall. Height: 8-12 inches (not in flower); 12-18 (in flower)