I agree with Will, it looks good to me in the photo. Perhaps it looks different in person? I water my Boston fern with a very low dose water soluble fertilizer every time I water and it does very well. I mix it up in gallon containers and have it ready to go for watering all my plants, that way they have a constant level of nutrients. I don't like the fertilizer sticks, they become an area of green mush in the soil.
Additional thought- ferns take dividing easily, so if it's too cumbersome as a giant fern, and you want say, 4 smaller plants, that's ok to do too! Take the plant out of the container and use a knife to divide into however many pieces you would prefer. If you decide to do so, I wouldn't wait too long- best time to do this is spring/summer.
