The Ice Dragon Maple appears to be a dissectum type with with lacy leaves - a form I do not feel works well for bonsai. Why not use Amur Maple (A. ginnala) which is hardy to one USDA zone more than the Ice Dragon (zone 3 vs. zone 4). It has a nice leaf that is similar to the trident maple and about the same size. It does not heal large wounds very well, but responds well to standard maple processes in bonsai.
2 Likes