Hey!
My favorite fern happens to be Woodwardia fimbriata, the Giant Chainfern. If it survives in your zone, it'll obviously suffer winter-burn...but it'll replace its fronds very quickly in the spring and summer. They take about three years to become established, so buy a decent plant - with fronds already one to two feet in length - and keep it watered. I tend to mulch with last year's fronds.

Anyhow, these ferns will easily grow six feet by six feet, as the link suggests, and up against buildings they'll reach even farther. My sister's, on the north corner of her house, was seven feet tall a month ago.

I've seen them wild on stream-sides growing close to eight feet.

Josh

Here is a link that might be useful: Woodwardia fimbriata

Thanks for the input. I had done some research, and had come across ostrich ferns, but was wondering if there wasn't something else out there.

Thanks again. I love this site. New to it.

Good grief i never realised Ostrich was that tall!

How about the Western sword fern?
Not the tallest (3 - 5 feet)...but it sure fills in well. This fern is quite tough against drought in my yard, and can handle cold weather, too.

Josh

Here is a link that might be useful: Western sword fern profile

I'll put in a good word for the ostrich fern - many of mine get to 5 feet. That section of garden has an almost prehistoric look to it.