Daminozide is primarily used as a plant growth regulator in agriculture. It is applied to control the height and promote the flowering of ornamental plants, particularly in the cultivation of chrysanthemums, poinsettias, and other potted plants. By inhibiting gibberellin biosynthesis, it helps in producing more compact and sturdy plants, which are desirable for commercial horticulture. Additionally, it is used to delay fruit ripening in some crops, extending their shelf life. However, its use in food crops has been restricted or banned in several countries due to health concerns.