Fern Question

in Plants
I rescued 😁 a supposed houseplant from a sale table in the GC.
It was in a tiny pot 2" supposed to go in a terrarium
My question is after re potting and TLC this is it now.
If it keeps on growing this fast, after a month ,should it really be outside? I would be potting it on for the winter ( would have to go in the conservatory as getting too big for the window) and maybe find it a home in spring.
The other question is why has it put out bare stems
As I have no idea what type of fern it is I dont know if this is normal, but I do love its feathery texture so want to do what's best for it.
Any suggestions would be gratefully received.
It was in a tiny pot 2" supposed to go in a terrarium


The other question is why has it put out bare stems

Any suggestions would be gratefully received.
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https://www.google.com/search?q=maidenhair+ferns&client=firefox-b-d&source=lnms&tbm=isch&sa=X&ved=0ahUKEwiMw8at3-LkAhXxRxUIHXcuCOoQ_AUIESgB&biw=1920&bih=944
Mystery fern is denser.
Ferns from pics are really hard.
Maybe Polystichum setiferum plumosum...or similar.????
syn Polystichum setiferum 'plumoso-multilobum' ????
https://www.google.com/search?q=polystichum+setiferum+plumosum&client=firefox-b-d&source=lnms&tbm=isch&sa=X&ved=0ahUKEwjB7YDc3-LkAhUsVBUIHQiEBLMQ_AUIESgB&biw=1920&bih=944
I remember the seventies and it put me off indoor ferns and macrame hanging baskets forever 😀.