Other perennial vegetables worth a try are
Good King Henry (“Lincolnshire asparagus”) –
Chenopodium bonus-henricusTurkish rocket –
Bunias orientalisBistort (“Easter ledges”) –
Polygonum bistortaRamsons –
Allium ursinumand, of course, the indispensable nettle.
I have grown all of these at one time or another.
An excellent source for “unusual” vegetables is Simon Hickmott,
Growing Unusual Vegetables, Ecologic Books, 2003.
http://www.amazon.co.uk/gp/product/1899 ... d_i=468294Unfortunately, Simon’s venture, Future Foods, which supplied many of the crops listed, ceased trading some years ago.
A comment, if I may, on the link in the original post: two of the plants listed I have grown and they are not perennial. Amaranths are half hardy annuals – only “perennial” if you let them seed; then they will appear everywhere, as I know from experience. Buckshorn plantain is at best biennial, though usually annual – another prolific self-seeder. I found it palatable only in early spring when very young.
PS If anyone does decide to grow
Apios americana or
Sagittaria latifolia it would be extremely interesting to hear their experiences.