Canna 'Scarlet Fever' is a small Crozy Group cultivar, with green leaves and multi-coloured flowers.
Canna 'Scarlet's Rib' is a medium-sized Foliage Group cultivar, with green leaves and orange flowers.
Schwäbische Heimat requires research.
Canna 'Scorch' is a medium-sized Foliage Group cultivar, with green leaves and pink flowers.
Canna 'Sentinel' is a medium-sized Crozy Group cultivar, with green leaves and red flowers.
Canna 'Shell Pink' is a medium-sized Crozy Group cultivar, with green leaves and pink flowers.
Canna 'Showman' is a small Crozy Group cultivar, with green leaves and multi-coloured flowers.
Canna 'Sicilia' is a medium-sized Italian Group cultivar, with green leaves and yellow flowers.
Canna 'Snow White' is a small Crozy Group cultivar, with green leaves and white flowers.
Canna 'Soliel d'Or' is a medium-sized Crozy Group cultivar, with green leaves and yellow flowers.
Canna 'Sophia Young' is a medium-sized Premier Group cultivar, with green leaves and red flowers.
Canna 'Sophie Buchner' is a medium-sized Crozy Group cultivar, with green leaves and red flowers.
Canna 'South Pacific Scarlet' is a medium-sized Premier Group cultivar, with green leaves and red flowers.
Souvenir d'Adr. Seneclause requires research.
Souvenir de Antoine Crozy is a synonym of Antonin Crozy.
Souvenir de François Gaulin requires research.
Canna 'Souvenir de Jeanne Crozy' is a medium-sized Crozy Group cultivar, with green leaves and yellow flowers.
Canna 'Souvenir de Madame Crozy' is a medium-sized Crozy Group cultivar, with green leaves and red flowers.
Canna 'Souvenir de Madame Nardy' is a medium-sized Crozy Group cultivar, with green leaves and multi-coloured flowers.
Canna 'Souvenir de Roussain' is a medium-sized cultivar, with green leaves and red flowers.