Whilst most Helianthus are indeed grown for their large yellow flowers, this one is grown for its amazing leaves. These grow the length of the wandering 2 - 2.5m stems cascading out like a green feather boa. Very tactile and unusual. Spreads gently in light soils. Looks very impressive grown and staked as a screen. The yellow flowers in mid-late autumn are a bonus ... or not, depending on your point of view.