Hi Anne
I don’t have any US specific plant databases. I use PlantManager for my planting plans and this has a database of 6000 plants. It has a free version to try.
I’ve actually just begun compiling a list of free, open source and cheaper software that could be helpful for a design office. I’ve got 7 listed now but will continue to add to it as I go….
http://cadsmarter.com/members/software/ – it’s for members but you can go here to become a member
Regards
Paul Stafford
