What is the function of a growth regulator in horticulture?

• A. A fertilizer
• B. Chemicals used to modify plant growth patterns, such as reducing shoot elongation, promoting branching, or influencing fruit set and ripening
• C. A pesticide
• D. A soil conditioner

Answer: (B)

Growth regulators are chemicals used to modify how a plant grows, not to feed it or protect it. They influence growth patterns such as height, branching, and fruit development. For example, they can limit shoot elongation to keep plants compact, promote more branching for a fuller shape, or affect when and how fruits set and ripen. Because of these targeted effects, growers apply them in precise amounts and at specific times to achieve desired plant form and production. This is different from a fertilizer, which provides nutrients; a pesticide, which controls pests; or a soil conditioner, which improves soil properties. Growth regulators focus on directing development rather than feeding the plant, killing pests, or changing the soil.