Long-necked 'Swansdown' has sturdy stems holding up huge fully double pure white blooms with cut petal tips. It's a real 'ta-dah!' moment when they burst out of the confining buds and unfurl. Lovely in the spring to the early summer garden, where their bright beacons perk up dark flowers like 'Bowles' Black' viola and 'Black Knight' snapdragon. Self-sows.