Canna 'H.W. Coles' is a medium-sized Premier Group cultivar, with green leaves and orange flowers.
Canna 'Hannah Dalebø-Wood' is a medium-sized Premier Group cultivar, with dark leaves and pink flowers.
Canna 'Happy Carmen' is a small Crozy Group cultivar, with green leaves and red flowers.
Canna 'Happy Cleo' is a small Crozy Group cultivar, with green leaves and orange flowers.
Happy Donna requires research.
Canna 'Happy Emily' is a small, with green leaves and yellow flowers.
Canna 'Happy Isabel' is a small, with green leaves and pink flowers.
Canna 'Happy Julia' is a miniature Crozy Group cultivar, with dark leaves and pink flowers.
Happy Valerie requires research.
Canna 'Harmony' is a small Crozy Group cultivar, with green leaves and red flowers.
Canna 'Harvest Yellow' is a medium-sized Crozy Group cultivar, with green leaves and yellow flowers.
Heart's Desire requires research.
Canna 'Heinrich Seidal' is a medium-sized Crozy Group cultivar, with green leaves and red flowers.
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.