You'll find the Willow's can be a nightmare to control, both in and out of the water. Willow spreads by sucker roots, seeds, and, fragmentation! small limbs becoming only a half inch piece from getting chopped up by a lawn mower can grow roots and become dozens of sprouts in just a few days...
I like the looks of Bald Cypress. I also love a big willow. Just makes sure you KNOW you will devote time and resources that can maintain the look wanted.
My understanding Rainman from some other threads on this site was that weeping willows are not invasive the way common willows are. Are you saying the tree might still try to take over around the pond?
