Six Hills Giant lives up to its name, growing up to 60 cm tall and can swamp its neighbours if not given enough room. It makes a wonderful display from spring through Christmas, and if given a haircut after this it will put on another show. The flowers are much larger than the normal garden type and generously displayed.

H: 90 W: 80
Frost tolerance: hardy
Water use: 1
Perennial
Position: sun
Primary flower colour: mauve