Celosia flowers need bright sunshine and a well drained soil. The best part of growing Celosia is that it doesn’t require much care! It is a hardy plant and will thrive in areas where hardly anything grows. This variety belongs to the Amaranth family and is both ornamental and edible. They look better in groups and are lovely, as cut or dried flowers. From early July till it becomes cold in September, Celosia can grow to up till 24 inches in height.