Methods of improving plant growth involve applying a first growth composition to a plant or part thereof during a first growth stage. The first growth composition includes a first active component combination comprised of auxin, gibberellin and cytokinin. The amount of cytokinin is less than the amount of auxin and gibberellin. The method also involves adjusting the amount of auxin, the amount of gibberellin, and/or the amount of cytokinin after the first growth stage, and applying a second growth composition to the plant or part thereof during a second growth stage. The second growth composition can include a second active component combination, different than the first, that includes a second amount of auxin, a second amount of gibberellin, and a second amount of cytokinin. In some examples, the method can also involve growing the plant to maturity, thereby improving growth of the plant.
