Browse Agastache flower garden seeds. Native to Eastern Asia and North America, Agastache is an aromatic herbaceous perennial flower. Agastache means "many spikes" in Greek due to it tight blossoms that cover the stiff stems in small short, colorful spurts. Agastache flowers attract hummingbirds and come in a variety of cool colors: white, purple, pink, blue. Used by Chinese Herbologists for centuries. Resistance to deer and rabbits.