Sue,
Count me in for the spiderwort. I'm slowly (ok, veeeeery slooooowly) restoring our back area to a real woodland again. All of those freakin' rocks keep getting in the way! I'm starting to dump 'dead' pots back there to add some soil on top. If things ever dry out enough to fire up the chipper, we'll have a nice organic start for the ferns and stuff I'm stockpiling. The woodland poppies are doing their part! What was one plant 2 years ago is now something like 60! Those suckers are coming up everywhere back there. I'm hoping to get some seeds collected soon.
I'd also go in one some pro-mix