Here we had just finished getting the row cover down when it was starting to get dark. Just in time. The row cover is covering a row of mustard greens. It is a thin row cover, the purpose of it is not to keep the plants warm like you would usually use row cover for, but instead to keep insects (mostly flea beetles) from completely destroying the greens. Flea beetles can be a real pain to deal with. If you do not do something to protect plants such as mustard greens and eggplant, they can almost completely eat the plant to nothing. The funny thing is flea beetles are just very, very tiny black bugs, it is unbelievable how much damage such a small bug can do. So if your mustard greens, eggplant, radishes, turnips, kale, collards, kohlrabi, or a few other veggies, are getting eaten, and you see very little black bugs that jump really quick as soon as you try to touch them, you probably have a flea beetle problem. Next time I am out there (today or tomorrow) I am going to have to make some sticky traps to put under the row cover. No matter how fast you put the row cover up, and how tight you seal it there will be some flea beetles under there, and the sticky traps can help to get rid of them. I will have to take some pictures and do a post on how I make my own traps.