BLArch Bachelor of Landscape Architecture Horticulture and Planting Design

Question 1

Which USDA Hardiness Zone covers most of the Pacific Northwest coastal region of the US?

Accepted Answer

Zone 8

Answer

The Pacific Northwest coast falls primarily in USDA Hardiness Zone 8, with mild winters rarely dropping below 10°F.

Question 2

What is the primary purpose of a 'rain garden' in landscape planting design?

Accepted Answer

Capture and infiltrate stormwater runoff

Answer

Rain gardens are shallow, planted depressions designed to capture and infiltrate stormwater runoff from impervious surfaces.

Question 3

Which term describes the practice of using plants native to a specific region in landscape design?

Accepted Answer

Native planting

Answer

Native planting uses plants indigenous to a specific geographic region, supporting local wildlife and requiring less maintenance.

Question 4

What does 'xeriscaping' primarily aim to achieve in landscape design?

Accepted Answer

Reduce water usage through drought-tolerant planting

Answer

Xeriscaping is a landscaping approach that reduces or eliminates the need for supplemental irrigation by using drought-tolerant plants.

Question 5

Which soil amendment is commonly used to improve drainage in heavy clay soils?

Accepted Answer

Coarse sand or grit

Answer

Coarse sand or grit added to clay soils increases pore space, improving drainage and aeration.

BLArch Bachelor of Landscape Architecture Practice Test