Cammissonia cheiranthifolia

Campanula vidalii

Cantua buxifolia "Sacred Flower of the Andes"

Cerinthe major purpurescens

Clarkia amoena 'Aurora'

Clarkia amoena 'Gloria'

Clarkia breweri

Clarkia concinna 'Pink Ribbons'

Clematis ternifolia "Sweet Autumn Clematis"

Clianthus puniceus "Parrot's Bill"

Cobaea scandens 'Cup & Saucer'

Collinsia species 'Purple'

Commelina coelestis

Convolvulus tricolor 'Royal Ensign'

Cosmos 'Apricot'

Cunonia capensis

Cuphea species 'Strybing Sunset'

Cynoglossum amabile "Chinese Forget Me Not"