You might consider bald cypress, which should be hardy in your area. Also
Nyssa (tupelo), and alders.
"JNJ" wrote in message ...
I am looking for a few species of trees with deep roots -- the deeper, the
better. I want to ease some water issues we're having on our property,
mostly from water that is deeper in the ground than it is at the surface.
I'm considering Poplar & Alder -- already have a Willow & a Sycamore, and
I'm not entirely certain a Birch would work well.

Any other suggestions?

James
Zone 6, SW Ohio