What can I plant in a very wet location?

There is a drainage ditch near the end of my backyard. There's an area of about 5 feet after that to the neighbor's fence. That 5 foot section is my problem. While there is grass growing there, I can't use my lawnmower due to the area being so wet (wheels sink right in). Using the weed eater is killing my arms and takes a lot of time. Is there some kind of plants or ground cover that I could plant that wouldn't need much care?
  3 answers
Your comment...