Answer: It's probably best to unpot the fern, cut away the dead leaves and roots, and repot it into fresh soil. Then put it outdoors in a shady location for the summer. There's no guarantee the plant will survive another winter on your porch - how about taking a cutting and bringing it indoors in the fall? Just remove the fern from the pot and slice off a healthy portion of roots with a few fronds attached. Pot it up and take it indoors for the winter. Then in the spring you can take the plant outdoors again.
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