Which tree growth regulation technique is aimed at keeping maintenance low?

Tree Growth Regulators (TGRs) are substances used to manage the growth and development of trees by influencing physiological processes. When applied appropriately, TGRs can help to control tree height and promote denser branching. This, in turn, leads to a reduced need for maintenance activities such as pruning or trimming, as the trees remain smaller and more manageable over time. By utilizing TGRs, landscape managers can achieve healthier trees that require less frequent intervention, resulting in lower maintenance costs and reduced labor.

In contrast, other options like foliar feeding, pruning, and regular watering do not primarily focus on reducing maintenance needs. Foliar feeding is aimed at providing nutrients directly to the leaves, enhancing tree health but not directly reducing their growth. Pruning is an essential practice for managing tree size and health but typically requires regular attention and is labor-intensive. Regular watering is crucial for tree survival, particularly in periods of drought, but does not control growth in any significant way. Therefore, TGRs are distinctly effective for keeping maintenance low while still promoting overall tree health.