What are the classifications of bonsai based on type of growth?

The classification of bonsai based on type of growth primarily distinguishes between formal and informal styles.

Formal bonsai often exhibits a straight trunk with symmetrical branching, which gives it a more traditional and structured appearance. This style is characterized by its upright growth pattern, conveying a sense of stability and order. In contrast, informal bonsai presents a more relaxed, natural look with curves and bends in the trunk, reflecting the organic shape of trees found in nature. This style captures the essence of nature's randomness, promoting a sense of harmony and balance.

Understanding these classifications is essential for bonsai cultivation, as each style influences the pruning techniques, pot selection, and overall aesthetics of the tree. Conversely, classifications based on other criteria like width and height do not focus on growth patterns and therefore do not serve the same purpose in the context of bonsai classification.