Support WBURSeaweed On Your Dinner Plate: The Next Kale Could Be KelpPlay03:55Download AudioFred BeverJune 05, 2016 ShareSeth Barker of Maine Fresh Sea Farms checks a seaweed line. People have foraged wild seaweed off the Eastern Seaboard for centuries. But now a much more active effort to grow seaweed in the U.S. is afoot. (Portland Press Herald via Getty Images)