Canna 'Constitution' is a medium-sized Conservatory Group cultivar, with dark leaves and pink flowers.
Canna 'Copicana' is a medium-sized Crozy Group cultivar, with green leaves and orange flowers.
Canna 'Copper Giant' is a tall Crozy Group cultivar, with green leaves and red flowers.
Canna 'Cora' is a medium-sized Crozy Group cultivar, with green leaves and pink flowers.
Canna 'Corail' is a small Crozy Group cultivar, with dark leaves and orange flowers.
Canna 'Corrida' is a small Crozy Group cultivar, with green leaves and red flowers.
Canna 'Corsica' is a small Premier Group cultivar, with green leaves and multi-coloured flowers.
Canna 'Cosmopolitan' is a small Foliage Group cultivar, with green leaves and red flowers.
Costa Rica Red requires research.
Cote d'Or is a synonym of Côte d'Or.
Canna 'Côte d’Or' is a medium-sized Crozy Group cultivar, with green leaves and yellow flowers.
Countess of Willingdon requires research.
Cream Beauty requires research.
Canna 'Creamsickle' is a medium-sized Crozy Group cultivar, with green leaves and yellow flowers.
Canna 'Creamy Stripes' is a small Premier Group cultivar, with variegated leaves and yellow flowers.
Creamy Swoon requires research.
Creation Spark requires research.
Crème Abricot requires research.
Creme de Creme requires research.
Canna 'Cremora' is a medium-sized Premier Group cultivar, with green leaves and white flowers.