This page explains that plant growth occurs mainly at meristems through rapid cell division, particularly in stems where the apical meristem at the shoot apex contributes to elongation and leaf produc...This page explains that plant growth occurs mainly at meristems through rapid cell division, particularly in stems where the apical meristem at the shoot apex contributes to elongation and leaf production. Lateral buds generate new branches, and under certain conditions, the apical meristem may develop into a flower bud, stopping further stem growth.