Oh, sorry it took so long for somebody to respond, Ibis! I don't have one here, but had a beauty in my yard at our last house. They certainly don't spread themselves around like the invasive Boston Ferns do, but they grow into a really huge plant if you plant them somewhere they are happy.
I mean HUGE. See the picture in your database link? (click on the link, then on the picture) See that blue thing holding the leaves of the fern up? It's a furniture moving dolly, probably almost 5ft. tall.
So, you'll be fine if you want a really large feature plant in a shady, moist spot.
