I have just been away for a few days, and it is too beautifully damp out there to garden, so here are some pictures of treeferns in their natural state, from my trip away. This is a photo taken in the cool rainforest on the Black Spur, near Melbourne.
You can see the treeferns on either side of the road. And the hillsides are densely covered.
The large version is HERE.
Here is another one, right beside the road, and quite tall
The large one for that is HERE.
Although I have some in my garden, I doubt they will ever look this good.