Scorpio requires research.
Canna 'Sémaphore' is a medium-sized Crozy Group cultivar, with dark leaves and yellow 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 'Shenandoah' is a medium-sized Crozy Group cultivar, with dark leaves and pink flowers.
Shiraz requires research.
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.
Singapore Girl requires research.
Sirius requires research.
Sky Hawk requires research.
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 'Soudan' is a medium-sized Italian Group cultivar, with dark leaves and orange flowers.
Canna 'South Pacific Scarlet' is a medium-sized Premier Group cultivar, with green leaves and red flowers.
Canna 'Souvenir de Jeanne Crozy' is a medium-sized Crozy Group cultivar, with green leaves and yellow flowers.
Canna 'Souvenir de Madame Nardy' is a medium-sized Crozy Group cultivar, with green leaves and multi-coloured flowers.
Canna 'Souvenir de Robert Owen' is a medium-sized Crozy Group cultivar, with dark leaves and red flowers.
Canna 'Souvenir de Roussain' is a medium-sized cultivar, with green leaves and red flowers.