Your plant might not need re-potting right away. My two Asplenium antiquums needed re-potting about a month after I'd bought them - the way I was able to tell, aside from noticeable growth, was that they needed almost daily watering in order to keep the soil from drying out completely.

They are "heavy drinkers"

Mine. The whole thing photo with my little helper doesn't really show how large those fronds are. My camera sometimes does that quasi fisheye thing. I hate that.Oh well,she's 4'?..longest fronds right now are 5' in July. Photo was taken in December. You can see how cold she is in our bitter frozen winter climate..wink.

The round things are Podocarpus gracilior seeds. Parrots love them I hear.