If this has leaves coming off of a central stalk, as it looks like it does (the foliage tapering up to a point at the top, like a Christmas tree) it will not be a fern. Looks more like some sort of edible plant, maybe something similar to or related to arugula.
I was thinking fern as it looks similar to this fern I have which is just starting to come back, what do you guys think... Ed
http://www.yonemura.co.jp/zukan/zukan-k/naiyou/polypo-sco0.htm Microsorium scolopendrium http://www.tropiflora.com/creport/cr15-1/images/7113.jpg Phlebodium It reminds me of these but they wouldn't be hardy in the Northeast?