Gibberellins are used commercially to promote flowering and fruit development because of their growth stimulation. Cytokinins are a group of natural plant chemicals found in endosperms, the nutritive tissue of embryonic seeds, and in the development of fruit. The cytokinin zeatin, in conjunction with auxins, stimulates cell division, particularly for shoot growth. Cytokinins also maintain cell growth, differentiation, and division. Inhibitors are hormones that inhibit plant growth.
Some inhibitors make the plant leaves fall off in the Autumn.
Other inhibitors prevent the formation of buds in cold seasons. Ethylene makes fruit ripen which inhibits certain plants from maturing fully. All plants need a fitting place to call home. This place is called its environment. Everyone knows that plants need suitable climate, water, and sunlight for photosynthesis in their environment.