For those haven't seen the tree, it's quite small. One needs to get on the ground with the cam only a few inches off the ground. A 24mm seems to work well, for this shot I used the Zeiss 21mm f/2.8. Yes, the crowds can be annoying, but there is a membership that can be purchased, which gets one and a friend in early, (before the leaf blowers start their work), and sometimes even a evening period for photogs only. The gardens value photographers, for they have helped make the gardens world famous.
I appreciate all the positive comments...Thanks.