Certified Arborist Practice Test 2025 - Free Arborist Practice Questions and Study Guide

Planting trees in the fall is beneficial primarily because it allows for root establishment before winter arrives. During the fall, temperatures are cooler and there tends to be more moisture in the soil. These conditions can promote root growth, enabling the tree to establish itself before the onset of winter dormancy. This root establishment is essential for the tree's health, as it will be better prepared to absorb water and nutrients when the growing season begins in spring.

The other statements do not accurately reflect best practices for tree planting. For instance, while trees can indeed be planted in fall, it is not the only time suitable for planting; trees can also be effectively planted in spring. Additionally, while fall is a good season for planting, it is not generally considered the least favorable season; this typically varies based on climate and tree species. Lastly, fall planting does not prevent water retention; in fact, the cooler, moist conditions can help retain moisture, which further supports root establishment.