Tobago requires research.
Canna 'Tom Thumb' is a small Miniature Group cultivar, with green leaves and yellow flowers.
Canna 'Topaz' is a small Premier Group cultivar, with green leaves and orange flowers.
Canna 'Torchlight' is a medium-sized Foliage Group cultivar, with green leaves and multi-coloured flowers.
Canna 'Tornado' is a medium-sized Foliage Group cultivar, with green leaves and red flowers.
Tourmaline requires research.
Tournefort requires research.
Tous-les-mois is a synonym of indica var. indica.
Tout Lyon requires research.
Transvaal Beauty is a synonym of Frau Gartenburg.
Trayas requires research.
Canna 'Trilby' is a medium-sized Italian Group cultivar, with green leaves and multi-coloured flowers.
Canna 'Trinacria' is a medium-sized Italian Group cultivar, with green leaves and yellow flowers.
Canna 'Trinacria Variegata' is a small Italian Group cultivar, with variegated leaves and multi-coloured flowers.
Canna 'Triomphe' is a medium-sized Premier Group cultivar, with dark leaves and red flowers.
Triomphe de Nantes requires research.
Triton requires research.
Canna 'Triumph' is a small Crozy Group cultivar, with green leaves and red flowers.
Canna 'Trocadéro' is a medium-sized cultivar, with green leaves and red flowers.
Tropic Biscuit requires research.