I bought a 6 foot tall Emperor 1 japanese maple last year that I planted in the ground in Mai 2017 in zone 5A that I protected with burlap. After a cold winter only the bottom 2 branches leafed out this year. It seamed like the top was going to leaf but stopped while leafing out... I was wondering if I could cut the trunk for a Bonsai ? Because I cant leave it where it is because it looks very bad.