Not too much, in fact maybe not enough. I'm a fan of Jerry Uelsmann, which I'm guessing this is a homage to. IF you feel like playing around with it further I'd try the following and see if it looks better or not.
1: Get rid of the two horizontal shadows on the ground by her knees and calves. The reason is to make more of a frame and these two shadows chop up her proportions. Going in the oposite direction; I see where you could be using the scenery to accent her body sections by having lines running to her hips and knees, but I'd still get rid of the short thick shadow by her calves and lighten the shadows slightly to a closer match to the limbs of the trees.
2: Bring the material at her feet that drapes off to the left and fill it around to an equal amount to the right, mirror-like, to create more of a base to the model. By being the only asymetrical thing in the image it draws away from what should be the main interest. Keep the small branches that come up in front.
3: Add more branches to the empty spaces along the sides of the image. I wouldn't blur out the sides of the image but keep it sharp.
Again these are not criticisms, the picture is good as is, but suggestions that may or may not work to make the image better.