Nice and green TJ! I have difficulty getting this kind of foliage density on my ginkgo-s I am beginning to believe that the roots are not very frost hardy, and since I have begun to overwinter them with a little more TLC, they seem to be doing better than before.
I also am keeping them out of full sun (California sun, here) and I have healthier looking leaves. I don't know if this is the complete answer, but they seem to be getting better. I have five plants, but they represent only two different cultivars. There are all kinds of interesting Ginkgo varieties, and a variegated one I have been trying to locate in the US, but I can't get a line on one.
I added a couple links to the
bonsaiTALK Links site on Ginkgo recently.
Thanks for sharing!