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.
Canna 'Herb’s White' is a medium-sized Crozy Group cultivar, with green leaves and white flowers.
Canna 'Herman' is a medium-sized Crozy Group cultivar, with dark leaves and red flowers.
Canna 'Hilary Owens' is a small Premier Group cultivar, with green leaves and pink flowers.
Canna 'Honey Mango' is a medium-sized Crozy Group cultivar, with green leaves and orange flowers.
Honeybunch requires research.
Canna 'Honeycomb' is a medium-sized Crozy Group cultivar, with green leaves and multi-coloured flowers.
Canna 'Horn' is a small Crozy Group cultivar, with green leaves and pink flowers.
Canna 'Hossegor' is a medium-sized Crozy Group cultivar, with green leaves and multi-coloured flowers.
Canna 'Howzat' is a medium-sized Australian Group cultivar, with dark leaves and yellow flowers.
Canna 'Hungaria' is a medium-sized Crozy Group cultivar, with green leaves and pink flowers.
Canna 'Imagination' is a small Crozy Group cultivar, with green leaves and orange flowers.
Impyan Fire requires research.
Canna 'Independence' is a medium-sized Conservatory Group cultivar, with green leaves and yellow flowers.
Canna 'India Prince' is a small Foliage Group cultivar, with dark leaves and red flowers.
Canna 'Indiana' is a tall Italian Group cultivar, with green leaves and orange flowers.
Canna 'indica f. Argentina' is a tall species, with green leaves and orange flowers.
Canna 'indica f. Australia Orange' is a giant species, with green leaves and orange flowers.
Canna 'indica f. Australia Red' is a medium-sized species, with green leaves and red flowers.