Ancymidol is widely used in agriculture and horticulture as a plant growth regulator. It effectively controls excessive vegetative growth by inhibiting gibberellin biosynthesis, which results in shorter, more compact plants. This makes it especially valuable in the production of ornamental plants, where controlled size and shape are important for aesthetic and commercial purposes. It is commonly applied to greenhouse crops such as poinsettias, chrysanthemums, and bedding plants to reduce stem elongation and improve plant uniformity. Ancymidol can be applied as a foliar spray, soil drench, or incorporated into growing media, offering flexibility in use. In addition to ornamentals, it is used in some vegetable and nursery crops to manage plant height and enhance tolerance to transplanting. Its growth-retarding effect helps reduce the need for mechanical pruning and improves packing and shipping efficiency. Due to its systemic activity, only small amounts are needed for effective control, making it a cost-efficient option in crop management programs.