Grow perennial vegetables. Plant once, enjoy for 20 years. This pic is an artichoke that grows very tall. "They are ideal for planting now in the veg patch, big pots or even within gaps in beds and borders. My choice of long-living edibles that are easy to look after are asparagus, globe artichoke, Jerusalem artichoke, sea kale, cardoon, chicory and varieties of broccoli, onion and oca, a plant from South America that forms underground tubers that are eaten like potatoes."