2 (4)m, American Pokeberry is a very large and decorative. fast growing species. Similar growing habit as the above, yet it makes much taller, losely branching stems from a massive perennial rootstock. Numerous cone shaped, white inflorescences followed by decorative purple-black and glossy berries at the end of summer till autumn. Stalks emerge in early spring and are fast growing to their size. For any rich, well drained soil in partial shade or full sun. VII-IX.