Anyone? I'll go up to 18". Thanks.

Here's a list of hardy ferns, but you might want to double check on their hardiness for zone 5. This list is from NC so it they are probably hardy to at least zone 6.

And this link here is from Akron Ohio: http://www.hardyferns.com/fpics/fpicindex.html

Here is a link that might be useful: Hardy ferns

I moved to zone 9 in Florida two and a half yrs. ago. I am finally in my ow place and used the site below to help me identify plants in my yard and figure out what I might grow. Being from Ohio originally I knew What grew there may not grow here. Hope this helps.

Here is a link that might be useful: HGTV Gardens