15 American Pokeweed (Phytolacca Americana) Seeds Zones 4+ Full Sun to Partial Shade Up to 10 feet tall. Produces dark purple berries that are a great source of food for song birds such as songbirds such as Gray Catbird, Northern Cardinal, Brown Thrasher, and Northern Mockingbird. The berries can also be used as a dye, although it fades over time. The young shoots when prepared properly are delicious and nutritious.