have: a few big shrubs, etc.
I have two, 15-20', dark pink crape myrtles. They're probably 15 years old.
I have two, sprawling, antique, pale, pale purple lilacs.
They're extremely large or mature, so if you're feeling frisky, this would be the time of year, given the rain and current gardening energy. I can not and am not going to dig them up, and pulling them out with a car or truck is not an option. if you're willing to dig, all I want in return is enough soil and/or leaf-gro type stuff to fill the holes way over the top. When it settles, I don't want big craters. Make sense?
Then I have a bunch of stuff that can be throw in on the side, which is also my Haves list for the swap:
Unlimited ditch lilies
Many different mints
Monardas 'Jacob Cline' and 'Raspberry Wine' and a mystery light pink one.
Vlad's thornless blackberry canes
'American Heritage' Raspberry canes (YUM!)
Eupitorium 'Gateway' and 'Little Joe'
I'll put up more, but this is what I'm thinking right now.
I'm at the south end of Bowie, and the top of Upper Marlboro (Rtes 214/301).