Canna 'Cannova Bronze With rich bronze leaves and bright red flower stalks, 'Cannova Bronze Scarlet' is hard to miss. A fast-growing variety, 'Cannova Bronze Scarlet' starts to bloom in the late spring and keeps pushing out flowers until frost. It's a hummingbird favorite, too. Other new color varieties include 'Cannova Red' and 'Cannova Yellow.'Scarlet'