What is Swiss chard? It’s a delectable leafy green vegetable, not nearly as common as spinach or mustard greens, for example. It is very tender with a mild flavor. My mother planted it in her garden when we were growing up and it was the only “greens” vegetable that I liked. I was pleasantly surprised to discover that it grows in Louisiana gardens. You should give Swiss chard a try, if you have never tasted it.