They grow very fast and are packed full of nutrients. Just snip and toss in your salad or on a sandwich. The Swiss Chard you can let grow until it has 4 leaves but the others, snip at will. I grow, Turnip, Beet, Mustard, Radish, Chinese Cabbage and what ever lettuce seeds I have. Use regular potting soil and wala!
It was 60 degrees here yesterday. All of Chicago was outside and of course, wearing shorts. Crazy weather.