ISA Certified Arborist Practice Exam

Which of the following statements regarding tree planting is correct?

1. The hole must be deeper than the root system

2. The tree should be watered after placement

3. Removal of all soil from the roots is necessary

4. Planting should happen in winter only

The correct answer is: The tree should be watered after placement

The statement that the tree should be watered after placement is correct because adequate hydration is critical for a tree's establishment in its new location. Watering helps to eliminate air pockets around the roots, which can impede water uptake and overall growth. It also ensures that the surrounding soil is moist, promoting the development of new roots into the native soil and facilitating the acclimatization of the tree. The other statements present practices that are not beneficial or incorrect. For instance, digging a hole deeper than the root system can lead to instability and excessive moisture retention around the roots. Removing all soil from the roots can damage the fine root hairs that are essential for nutrient and water absorption. Finally, planting trees only in winter is not a standard practice, as many trees can be successfully planted during spring and fall as well, depending on the species and climate conditions.