Canna 'Ingeborg' is a medium-sized Crozy Group cultivar, with dark leaves and orange flowers.
Canna 'Innosense' is a medium-sized Crozy Group cultivar, with green leaves and white flowers.
Canna 'International Brigade' is a medium-sized Premier Group cultivar, with dark leaves and yellow flowers.
Canna 'Intrigue' is a tall Foliage Group cultivar, with dark leaves and red flowers.
Canna 'iridiflora' is a medium-sized species, with green leaves and pink flowers.
Canna 'Iridiflora Rubra' is a medium-sized cultivar, with dark leaves and red flowers.
Isaac Casati requires research.
Canna 'Italia' is a medium-sized Italian Group cultivar, with green leaves and multi-coloured flowers.
Canna 'Ivor Evans' is a tall Italian Group cultivar, with green leaves and orange flowers.