Hosta sieboldiana:
Information gleaned from the fantastic Creating a Forest Garden by Martin Crawford, page 223. Edibilty rating out of 5 is from Plants For A Future website. ‘Blue Angel’ recommended by Johann Kuntz.
Stephen Barstow says all hostas are edible but it’s the larger cultivars which are used, as they’re easier to harvest. You can harvest all the spring shoots and it will regrow and flower in the same year; ornamental hosta growers do this for new leaves anyway. It’s also an easy plant to propagate by taking divisions.
Photo copyright Creative Commons by Andrew Duff on Flickr.