In cultivation since around 1900, this time-tested flower creates a sunny, cheery display in the summer garden. The elegant, tubular blooms of bright yellow draw butterflies, hummingbirds and other vital pollinators to the landscape. George Davidson's wiry stems make its flowers perfect for fresh-cut arrangements. The drought-tolerant, low-maintenance plants look fabulous when grown together in large groups or mixed in with purples, reds or whites.