This was brought to my attention over on the Bonsai Forum...
Here is a link that might be useful: US National Arboretum
The new garden sounds great, John! I'd love to visit it when it's complete :)
Thanks for posting this link.
Been a while since I've been, but the penjing garden was nice. This looks like the whole enchilada, though...
I loved the Penjing gardern (more than the penjing!) But when I went back to look at it a month ago, it was closed for renovations until next Spring. That new garden sounds wonderful.