Ok so I just got the new Southern seed exposure catalog and I am checking it out. I came across a chard variety called perpetual spinach http://www.southernexposure.com/perpetual-spinach-leaf-beet-chard-4-g-p-1904.html catalog mentioned it was a good spinach replacement that produced all summer long. Anybody grow this? Sounds great since this is a summer based catalog. FYI I love this catalog!