Which of the following is NOT a typical use of Tree Growth Regulators?

Tree Growth Regulators (TGRs) are chemical substances designed to influence the growth patterns of trees in various ways. The primary purposes of using TGRs include managing tree size, reducing the need for frequent pruning, and controlling aspects like flowering and fruiting.

Increasing tree height, however, is not a typical use of these regulators. In fact, many TGRs are applied specifically to limit growth in height or to promote lateral growth for bushier trees. This is particularly useful in urban settings or in orchards where excessive height can complicate maintenance and management.

In contrast, reducing tree pruning frequency is a common application as TGRs can help maintain a desired size and shape, limiting the growth that necessitates regular trimming. Improving tree health is also a goal of using TGRs, as they can enhance the vigor of trees by managing growth rates and optimizing nutrient allocation. Additionally, controlling tree fruiting is another common use of TGRs, allowing for better management of harvest times and fruit quality by regulating flowering and fruit set.

Thus, while tree growth regulators serve several beneficial purposes, increasing tree height is not among those typical uses.