Waitrose is offering three different sea vegetables this summer.
The retailer is working with a grower in the Midlands to bring samphire and sea aster to its fresh fish counters.
Waitrose fresh produce buyer Rhonwen Cunningham said: “Samphire became so popular during 2010 that customer demand outstripped our supply.”
A third sea vegetable called Okahijiki, originally from Japan, is to make its UK supermarket debut at Waitrose in late June.