Root Bound Maple Tree . Got this aged tree for a good price. A severely root bound plant may also have a container that is pushed out of shape or cracked by the. Bonsai Summer Images 2014 from www.bonsai4me.com Mix 5ml (1 teaspoon) washing up liquid in 1 litre (30 floz) water, and spray the infected area, especially on new shoots and the underside of the leaves. Some weird yellowing going on. Carefully slide the tree from the container.