NOT recommended.  Some yards in the coastal south are overun with this plant.  It spreads by globular  tubers and will take over an area in no time flat.   It caught my eye, so I got my start from a friend, whose neighbor's patch had spread into his yard.  I have since removed this species.   It might die back to the ground in a cold winter, but will make up for lost time when comes back in spring.  If you can't live without Sword Fern, get the native species, Nephrolepis exaltata.  

 One year later.