Grandis requires research.
Gravitas requires research.
Canna 'Green Wyoming' is a tall Italian Group cultivar, with green leaves and pink flowers.
Canna 'Grossherzog Ernst Ludwig von Hessen' is a medium-sized Crozy Group cultivar, with dark leaves and orange flowers.
Guatemala requires research.
Canna 'Guayaquilla' is a tall Foliage Group cultivar, with green leaves and orange flowers.
Guillaume Constan requires research.
Guillaume Coustou requires research.
Guillaume II requires research.
Gustav Gumpper requires research.
Gustave Bruchet requires research.
Gustave Grunerwald requires research.
Gustave Sennholz requires research.
Canna 'Guttermanni' is a tall Foliage Group cultivar, with dark leaves and orange flowers.