I have two maple seedlings (I know, not Bonsai for about seven years).
I collected the first one in late Spring, and kept it inside under a fluorescent light.
The second I collected near the end of Summer/early Autumn, and brought it in as well.
The spring tree has remained green, while the Autumn tree had grown woody outside. Does anyone have any idea why these two trees would be so divergent? Could it be more limited light or poor soil conditions for the Autumn tree over the summer? (It was growing in a burnt out stump between two structures) Or should I suspect that I've plucked two different types of maple from my yard?