Canna 'Giant Red' is a tall Foliage Group cultivar, with green leaves and red flowers.
Grand Cheik requires research.
Grand Opera Series requires research.
Canna 'Grandiflora floribunda' is a medium-sized Foliage Group cultivar, with green leaves and pink flowers.
Canna 'Guayaquilla' is a tall Foliage Group cultivar, with green leaves and orange flowers.
Canna 'Guttermanni' is a tall Foliage Group cultivar, with dark leaves and orange flowers.