ISA Tree Selection and Planting 3

Question 1

How long does a transplanted tree typically require to fully establish in a new planting site?

Accepted Answer

Approximately one year per inch of trunk diameter

Answer

6–12 months for any tree size

Answer

1–2 years regardless of caliper

Answer

3–5 years regardless of size or species

Question 2

Tree support stakes installed at the time of planting should generally be removed:

Accepted Answer

Once the tree can stand upright without support, typically within 1–2 years

Answer

After the first growing season regardless of tree stability

Answer

Permanently, as they provide lifelong structural support

Answer

Only when the tree exhibits signs of disease or stress

Question 3

Supplemental irrigation for a newly planted tree can MOST appropriately be reduced when:

Accepted Answer

Roots have expanded well beyond the original root ball into native soil

Answer

A significant rain event has occurred

Answer

Wilting is observed only during afternoon heat

Answer

The tree has been in the ground for 30 days

Question 4

Fertilization of a newly planted tree is MOST appropriate:

Accepted Answer

After at least one full growing season of establishment

Answer

Immediately at planting to stimulate early root growth

Answer

Monthly during the first growing season for maximum establishment

Answer

Only after clear signs of nutrient deficiency appear

Question 5

Which irrigation approach is MOST effective at promoting establishment in newly planted trees?

Accepted Answer

Slow, deep watering that wets the entire root zone

Answer

Frequent overhead sprinkler application to wet foliage and soil surface

Answer

Daily flooding of the base of the tree with high-volume water

Answer

Five-minute hand-watering sessions applied to the trunk base daily

Question 6

Anti-desiccant sprays are sometimes applied to newly planted trees primarily to:

Accepted Answer

Reduce water loss through transpiration from leaf surfaces

Answer

Prevent early-season insect feeding on new foliage

Answer

Provide foliar nutrient uptake during establishment

Answer

Protect against sunscald injury to the bark

Question 7

The PRIMARY reason tree wraps are applied to the trunks of newly planted trees is to:

Accepted Answer

Protect thin bark from sunscald, frost cracking, and equipment damage

Answer

Prevent vandalism and mechanical damage from people

Answer

Mark the tree's location for maintenance crew identification

Answer

Provide structural support to the trunk during the establishment period