Anyone who are interested in growing bonsai, will inevitably have to do three things to their trees in order to maintain and improve their bonsai :
Pruning – the trunk, the branches, or the roots.
Letting grow – the trunk, the branches, or the roots.
Wire – the trunk, the branches, or the roots.
The basis of these three fundamental tasks evolves around our understanding of how trees grow. and the way trees grow is largely dictated by the presence of a growth hormone, auxin.