Vigorous perennial daisy grown for its edible tubers. Dies back in winter. 
Other Names: Sweet Root, Peruvian Ground Apple
Origin: South American highlands
Size: 2m high, 1m spread
Growing conditions: full sun
Propagation: Replant corms after harvest
Growing tips: Harvest tubers when all the tops have died down but leave in the ground until at least mid to late winter as the flavour really does improve. Remove tubers carefully as they are brittle.
Use: Tubers are crip and sweet like apple and can be eaten raw. Even with prolonged cooking, yacon stays crisp and it can be used as a substitute for water chestnuts in Asian stir-fries. The main components are fructose and inulin, making it a suitable food for diabetics. It is a good livestock forage crop.
Availability in shop: Late spring to summer