Great trees you have there! How long do you have that sejiu elm there? I agree with you all, don't throw trees away when you can make bonsai out of it, you can even use it for experimenting and training with wiring, making shari etc.!
Great collection. I was thinking about digging up a few sugar maples but everything I've read says their leaves don't reduce. Not that it makes a difference to me....look at my motley collection. haha.