hi my year old cyrtomium was looking fine up until last week when the unfurled new growth has started to curl up. Considering it survived it's first winter i'm surprised that it looks to be struggling now. The leaves are curling up and have brown marks on some edges. I'm tempted to say it looks dry but it's been watered twice from a butt.

Has anyone else experienced this and if so, what's going on? It's in a most shaded position, receiving about 4 hours morning sun, in neutral clay but improved drainage soil.

Appreciate any help.