I hope to thwart the flea beetles on my tomatoes this year by using floating row covers. Since tomatoes aren't planted in "rows" like beans, etc (at least MINE aren't!), how do I place the covers? Does the covering have to be pinned to the ground over a brace like a tent would be or should it be pulled close around the base of the plant at the soil line?

Any suggestions on how to do this will be appreciated.