Butterflies and other beneficial pollinators adore Hello Yellow Butterfly Flowers. In mid to late Summer, upright clumps of narrow green leaves bear bright and bold clusters of golden-yellow flowers. Hello Yellow comes up so late in the Spring, so don't be concerned if you don't see it first thing in the season. Developed from a native North American wildflower, Hello Yellow is drought-tolerant, long-lived and easy to care for. It readily grows in full Sun and average, dry to medium, well-drained soil. Hardy in USDA zones 3 to 9. Each offer includes one dormant bare root plant.