Carnations is a herbaceous perennial plant growing to 80 cm tall. The leaves are-glaucous greyish green to blue-green, slender, up to 15 cm long. The flowers are produced singly or up to five together in a chyme they are 3–5 cm diameter, and sweetly scented; the original natural flower colour is bright pinkish-purple, but cultivars of other colours, including red, white, yellow and green, have been developed.
Carnations require well-drained, neutral to slightly alkaline soil, and full sun. Numerous cultivar have been selected for garden planting. Typical examples include 'Gina Porto', 'Helen', 'Laced Romeo', 'Red Rocket'. Colombia is the largest carnation producer in the world.
Carnations do not naturally produce the pigment thus a blue carnation cannot occur by natural selection or be created by traditional plant breeding. It shares this characteristic with other widely sold flowers like roses, lilies chrysanthemums and gerberas.Oxford University, carnation are traditionally worn to all examinations; white for the first exam, pink for exams in between and a red for the last exam. Originally this was a white carnation that was kept in a red inkpot between exams, so by the last exam it was fully red. It is thought to originate in the late 1990s.