Your Southern Maidenhair Fern (Adiantum capillus-veneris) looks very healthy but the brown, crinkly leaf edges may be from lack of enough humidity. You might want to try misting it daily, or even a couple of times a day to raise the humidity.
Hopefully someone more knowledgeable will be along soon and be able to offer suggestions and advice.
~ I'm an old gal who still loves playing in the dirt!
~ Playing in the dirt is my therapy ... and I'm in therapy a lot!
