Wasabia japonica is a member of the Brassica family, which includes cabbages, horseradish and mustard. The prized rhizome varies from a very light to a darker green, often with a purple ring running through it.
I love wasabi with my sushi - an absolute must. So you can imagine I was happy to find this company that can now help you grow your own wasabi. Have a look at their website http://www.thewasabicompany.co.uk
I am one for always adding wasabi to my sushi or sashimi. It has become an unmissable part of it I suppose.
Have a great day.