Oiseau d’Or

Canna 'Oiseau d'Or' is a medium-sized Crozy Group cultivar, with green leaves and yellow flowers.

Oiseau de Feu

Canna 'Oiseau de Feu' is a medium-sized Crozy Group cultivar, with green leaves and red flowers.

Oklahoma

Oklahoma_x000D_

Canna 'Oklahoma'

_x000D_ see Mrs Alfred F. Conard_x000D_ _x000D_ Canna 'Oklahoma' - see Mrs Alfred F. Conard

Old Gold

Canna 'Old Gold' is a medium-sized Crozy Group cultivar, with green leaves and orange flowers.

Old Red

Old Red_x000D_

Canna 'Old Red'

_x000D_ see Mystique_x000D_ _x000D_ Canna 'Old Red' - see Mystique

Oloha

Canna 'Oloha' is a small Crozy Group cultivar, with green leaves and orange flowers.

Ombersley

Canna 'Ombersley' is a medium-sized Premier Group cultivar, with green leaves and orange flowers.

Omega

Canna 'Omega' is a tall Foliage Group cultivar, with green leaves and pink flowers.