This popular aromatic herb is a favorite host plant of Black Swallowtail caterpillars. The plants can reach up to 18 inches and will thrive in partial shade to sunny conditions. Also consider carrot, celery, and dill plants if you want to host caterpillars. Zones 5-9
Black Swallowtail (Papilio polyxenes)
These make up to three flights between April and November in the eastern United States to south Colorado and southeastern California. You can identify them by the orange spot with a smaller black spot in the center near the tip of each hindwing. The female (shown) features an iridescent blue band on hindwings.