I have tons of wild ferns behind my house in a ravine including christmas fern and probably 20 other species, once the fiddleheads start sprouting they grow pretty fast. Here is a pic of some Northern maidenhair I grew from spores collected from the wild plants last year. This is the stage before the true plants grow, but you can see a few leaves starting to form from the gametophytes. I meant to collect a bunch more spore this last fall and store in the fridge but I forgot unfortunately. One problem you may run into starting them now is low humidity indoors, but Christmas fern is a bit tough for a fern and can tolerate some full sun and stays evergreen in winter.
