The white, 2-inch-wide, semi-double flowers—often with twisted tips to the petals—of whirlwind Japanese anemone (Anemone × hybrida 'Whirlwind') dance gracefully atop 3-foot-tall stems in the fall garden. Preferring cool, temperate climates to hot, humid summers, this hardy perennial also needs consistently moist soils. When given those optimal conditions, its long-lasting blooms will brighten the garden bed throughout autumn.