Crosne (Stachys affinis)
http://www.durgan.org/URL/?EHYNO 24 August 2009 Crosne
All plants are doing well. No underground tubers are forming yet. They require a long growing season, but can withstand much cold weather.

http://www.durgan.org/URL/?CBDDK Summary: Crosne (Stachys affinis) 2009