500 GIANT YELLOW HYSSOP Agastache Nepetoides Herb Flower SeedsComb S/H BLOOM TIME: Late Summer HARDINESS ZONE: 4 - 9 PLANT HEIGHT: 48 - 72" . . . PLANT SPACING: 18 - 24" LIGHT REQUIREMENTS: Sun - Part Shade . . . SOIL / WATER: Average - Dry The Yellow Giant Hyssop grows lovely tall spikes of flowers that have a spicy licorice scent. They attract bees, birds, & butterflies.