| Clematis gouriana |
| Clematis macropetala Kronklematis |
| Clematis potaninii var. fargesii |
| Clematis recta Styvklematis |
| Cleome hassleriana 'Senorita Rosalita' Paradisblomster |
| Clerodendrum bungei |
| Clethra arborea Konvaljträd |
| Clinopodium grandiflorum Rosenmynta |
| Clivia gardenii |
| Clusia fluminensis |
| Clusia guatemalensis |
| Clusia minor |
| Clusia nemorosa |
| Clusia palmicida |
| Clusia rosea Narrfikus |
| Clusia rosea 'Green Magic' |
| Clusia rosea 'Princess' Narrfikus |
| Cneorum tricoccon Dvärgoliv |
| Cobaea scandens Klockranka |
| Coccoloba pubescens Moralin |
| Codiaeum variegatum 'Petra' Kroton |
| Codiaeum variegatum 'Tamara' Kroton |
| Codiaeum variegatum 'Weismannii' Kroton |
| Codonanthe cordifolia |
| Codonanthe devosiana |
| Coelogyne fuscescens |
| Coelogyne mooreana |
| Coelogyne speciosa |
| Coelogyne tomentosa Gul drottningorkidé |
| Coffea arabica Arabisk kaffe |
| Colchicum autumnale Tidlösa |
| Colocasia esculenta Taro |
| Columnea minor |
| Columnea sanguinea |
| Columnea tulae var. tomentulosa |