Canna 'Harvest Yellow' is a medium-sized Crozy Group cultivar, with green leaves and yellow flowers.
hassleriana Kraenzl. is a synonym of glauca var. glauca.
Canna 'Heart Throb' is a small Crozy Group cultivar, with green leaves and multi-coloured flowers.
Heart's Desire requires research.
Heidenreich requires research.
Canna 'Heinrich Seidal' is a medium-sized Crozy Group cultivar, with green leaves and red flowers.
Heinrich Seidel (2) is a synonym of Roma.
Helen Gould requires research.
Hélène (Princess of Montenegro) requires research.
Heliconiæfolia requires research.
heliconiifolia Bouché is a synonym of indica var. indica.
heliconiifolia var. xalapensis (Horan.) Kraenzl. is a synonym of indica var. indica.
Canna 'Hellas' is a medium-sized Italian Group cultivar, with green leaves and multi-coloured flowers.
Canna 'Henri Cohn' is a medium-sized Premier Group cultivar, with dark leaves and pink flowers.
Henri Cornevon requires research.
Henri de Vilmorin requires research.
Henri Foulquier requires research.
Henri Guichard requires research.
Henri Louis Vilmorin requires research.
Henri Pasquier requires research.