Methods of improving plant growth involve applying a first growth compositionto aplant or part thereof during a first growth stage. The first growthcomposition includes a firstactive component combination comprised of auxin, gibberellin and cytokinin.The amount ofcytokinin is less than the amount of auxin and gibberellin. The method alsoinvolves adjustingthe amount of auxin, the amount of gibberellin, and/or the amount of cytokininafter the firstgrowth stage, and applying a second growth composition to the plant or partthereof during asecond growth stage. The second growth composition can include a second activecomponentcombination, different than the first, that includes a second amount of auxin,a second amount ofgibberellin, and a second amount of cytokinin. In some examples, the methodcan also involvegrowing the plant to maturity, thereby improving growth of the plant.
