First off, the container its in is to small, as if you pick up the
whole tree and take it out, its probaly rootbound, i would take the tree out put it in a 5 gallon+ grow bucket or in a grow bed. Dont mess with the roots at all as the tree is actively growing. Wait 2-3 years and the trunck should thicken up to the size u want. Good Luck and happy bonsai-ing
