Certified Arborist Test Installation and Establishment 2

Question 1

What is the recommended depth for planting a container-grown tree?

Accepted Answer

With the root flare at or slightly above grade

Answer

The root flare (where roots begin to spread from the trunk) should be at or slightly above the surrounding grade. Planting too deep leads to girdling roots and bark decay.

Question 2

When transplanting a balled-and-burlapped (B&B) tree, what should be done with the wire basket?

Accepted Answer

Remove or fold back the top third of the basket after the tree is in the hole

Answer

After positioning the tree, remove or bend back the top third of the wire basket and remove all burlap from the top. This prevents root girdling while maintaining root ball stability during planting.

Question 3

What is the ideal mulch depth around a newly planted tree?

Accepted Answer

2-4 inches

Answer

2-4 inches of mulch is ideal. It conserves moisture, moderates soil temperature, and suppresses weeds. More than 4 inches can cause moisture problems and attract rodents.

Question 4

Why should mulch be kept away from the trunk of a newly planted tree?

Accepted Answer

It can cause bark decay, pest habitat, and girdling roots

Answer

Mulch piled against the trunk (volcano mulching) keeps bark constantly moist, promoting decay, providing habitat for bark-boring insects, and encouraging girdling roots to form above the root flare.

Question 5

How often should a newly planted tree be watered during its first growing season?

Accepted Answer

Deeply 2-3 times per week, adjusting for rainfall and soil conditions

Answer

New trees need deep, regular watering — typically 2-3 times per week depending on soil type, weather, and rainfall. Shallow frequent watering encourages surface roots.

Certified Arborist Test Practice Test

Certified Arborist Test Practice Test

Certified Arborist Test Installation and Establishment 2