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
"All About Growing Jerusalem Artichokes" Once they're established, growing Jerusalem artichokes is more a matter of containing than encouraging them. These productive, nutty-flavored tubers can stand in for potatoes. From MOTHER EARTH NEWS
Sunchokes Also known as Jerusalem Artichokes or sun roots, this member of the sunflower family produces tubers that look like small, knobbly potatoes. They are crunchier and sweeter than a potato, however, with the slight taste of artichoke.
Growing Jerusalem artichokes (aka sunckokes) in containers. These edible tubers look like sunflowers but are quite invasive and nearly impossible to get rid of, so keep them in a container- the bigger the better. Easy harvesting is another nice bonus!