I made the same mistake I make every single year. I started some seeds and did not label the flats. So I think I potted collards in four inch pots, but it could be mustard or kale. I think the kale got mixed in with the trailing snap dragons, but, again I am not sure because I didn't label the flats. The only things I can identify are the lettuce, spinach, and beets. I will promise to label the flats next year, but if my history is any indication of my future, I will be complaining about this again next year. I will probably do it again this year when I start tomatoes and peppers.