CelosiaCelosia Celosia 'Atomic Deep Purple' Celosia is the kind of plant that tends to divide opinion but if you like bold colour and unusual form, it's hard to resist. 'Atomic Deep Purple' produces dense, velvety plumes in a deep, almost blackcurrant purple that holds its colour right through from midsummer to autumn. The drama is considerable. The effort required is not. Native to tropical Africa and Asia, celosia is frost tender and treated as a summer