I don’t mind the flame shape with ginkgoes, because it’s kind of what they do with time. I think the big differences between bonsai and natural is that first, the trunks definitely fatten and show more character in pots. It’s tough to argue against that, other than I really like the natural bark striations that I don’t see in pots.
The other difference is that the internodes get shorter in a pot, and the ramification then becomes denser; relative to a ginkgo growing in the wild. The branching structure is similar if you study the two.
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I had a couple others that I was growing in a “not flame shape”, like yours, but really they just looked like young ginkgoes you see lining the streets, with long sparse awkward branches...it wasn’t as appealing. A club member has an old S-shaped ginkgo that looks as unnatural as a cat in a swimming pool. If I was forced to take it, it would be chopped to 6” tall and started over.
So, looking at yours, what other options are you entertaining? It seems you can go long and lanky, or chunky and flame...haven’t seen much else.