As an Amazon affiliate, we earn from qualifying purchases made through affiliate links. You've probably heard that monarch butterflies are in trouble, and that a good way to support them is to plant swaths of milkweeds (Asclepias), because these plants are the only ones the monarch larvae will eat. Perhaps you've planted some of the three species that are commonly available: orange milkweed (A. tuberosa), common milkweed (A. syriaca) and swamp milkweed (A. incarnata).
