Love pink? Consider planting ‘Pink Double Delight’ Coneflowers (Echinacea purpurea ‘Pink Double Delight’). These gorgeous blooms feature bright pink, double pom-pom flowers set against vibrant green stems. They’re drought-tolerant and grow up to 20 inches tall. Bonus? They look stunning in cut-flower displays like bouquets and vases. 'Pink Double Delight’ Coneflowers are hardy in Zones 4 – 9.