Leaf mould would be better than peat. But the best mix will depend on what species of ferns you have - can you post some photos to help identify them?
I think they might be wood ferns.. well they look like that but I've seen other pictures that look similar
Okay thankyou very much Though I dont know where to get leaf moss, I'll have a look next time I go plant shopping
Hi Hcurtis, A walk in the woods should get you some leaf mould aka leaf mold. It's just rotted leaves. Just dig down below the leaves that are on the ground and you'll find the rooted ones from last year. A couple of handfulls shouldn't be a problem for the trees. Newt