Yacon is native to Peru and is grown for its tubers, like potatoes and yams. The leaves are edible as well. Apparently the taste is very fruity, and it's referred to as the "apple of the earth." However, even though it has a sweet taste, it's actually low in sugar. Yacon-derived products such as yacon tea and yacon syrup are popular among diabetics.
Yacon is a perennial plant and grows well in most climates, so it's a snap for home gardeners who wish to harvest their own. Yacon was consumed by the ancient Inca.
How to grow yacon