Eat one and you will find out instantly if it's any good. A yellow nutsedge tuber has a taste that is something like kerosene. There aren't many critters in the woods who will eat them. A chufa has a pleasing flavor that reminds me of almonds. They are grown for human food in Spain; I really don't know why it has never caught on here. Might be a marketing opportunity there for someone. Anyway, one bite and you will know.

The eggheads can't agree on whether chufa and yellow nutsedge is the same plant. Some say it is and some say it isn't. It will not cross, even when growing side by side, so I agree with those who say it isn't. And the plants don't look alike at all once they are 50-60 days old.