Petasites japonicus: 4′ high x indefinitely spreading / full shade / zone 4
Fuki is a commonly grown shade-lover, but its use as a vegetable is virtually unknown outside its native Japan, where it is cultivated for its edible leaf stalks. These are quite bitter, but quite nice boiled and peeled, and then added to soups, stir-fries, or fried in sesame oil. The plant needs shade to thrive; it won’t tolerate much sun. But given lots of shade it spreads aggressively, and forms a tall, dense ground cover. It tolerates wet soils, too, so it’s a good one to try in challenging conditions.