Canna 'speciosa (Roscoe) Hook.' is a medium-sized cultivar, with green leaves and multi-coloured flowers.
Canna 'Spiderman' is a giant Foliage Group cultivar, with green leaves and red flowers.
Spitfire requires research.
Canna 'Spotted Fever' is a small Crozy Group cultivar, with green leaves and multi-coloured flowers.
Canna 'Spritzii' is a medium-sized Foliage Group cultivar, with green leaves and orange flowers.