CPP Landscape Design & Installation 3

Question 1

What spacing formula is used to determine the number of plants needed to fill a bed at a specified on-center spacing?

Accepted Answer

Area ÷ (0.866 × spacing²)

Answer

For triangular (staggered) spacing, the formula Area ÷ (0.866 × spacing²) accounts for the offset rows, providing more efficient ground coverage than square spacing.

Question 2

Which landscape design principle ensures that the size of elements relates logically to the overall space and to each other?

Accepted Answer

Proportion

Answer

Proportion addresses the size relationships between landscape elements and their surroundings, ensuring features appear appropriately scaled to the space.

Question 3

During landscape installation, what is the purpose of staking and guying a newly planted tree?

Accepted Answer

To provide temporary wind stability until roots establish

Answer

Staking provides temporary support to prevent the root ball from moving during wind events, allowing roots to anchor properly; stakes should generally be removed after one growing season.

Question 4

Which of the following is the MOST effective strategy for minimizing plant establishment irrigation needs in a new landscape?

Accepted Answer

Selecting plants adapted to the local climate and existing site conditions

Answer

Choosing plants adapted to local climate, soil type, and moisture regime reduces supplemental irrigation needs and improves long-term plant survival.

Question 5

What is a 'concept plan' in the landscape design process?

Accepted Answer

A preliminary diagram showing design intent, functional zones, and spatial organization

Answer

A concept plan is an early-stage design diagram using abstract shapes and symbols to communicate ideas about space organization, circulation, and use areas before plant selection.

CPP - Certified Plant Professional Practice Test

CPP - Certified Plant Professional Practice Test

CPP Landscape Design & Installation 3