Ginger is a perennial flowering plant whose root is widely used as a spice or medicinally. It is often used in curries, stir-fries, salads and even smoothies. The flowers have pale yellow petals with purple edges and arise directly from the rhizome on separate shoots. Ginger needs warmth and should be grown in a frost-free spot, in full sun or partial shade, preferably in a greenhouse or conservatory. Plants will stop producing leaves in late summer and you can then harvest the ginger root anytime thereafter or before a first frost. Roots can be stored in the freezer.