Answer: Polystichum, or Sword Fern, is hardy in USDA zones 3-8 so it can live in your perennial beds without much trouble. If there is winter damage to the fronds, cut them back in early spring and your sword fern will develop new foliage. These plants can get quite large and the root system can become a thick mass, so plant carefully with the thought of digging and dividing every 4-5 years.
Best wishes with your garden!
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