Original: Other websites Growing Gardenias Gardenia is a genus of about 250 species of flowering plants in the coffee family , Rubiaceae , native to the tropical and subtropical regions of Africa , southern Asia , Australasia and Oceania .
Simplified: Gardenia is a genus of about 250 species of flowering plants in the family Rubiaceae . Gardenia can be found in the tropical and subtropical regions of Africa , southern Asia , Australasia and Oceania .