Landscape Design Plant Selection and Horticulture 2

Question 1

What is the recommended minimum soil depth for planting a 2-inch caliper shade tree?

Accepted Answer

24 inches

Answer

A minimum of 24 inches of quality soil depth is generally required to support the root system of a 2-inch caliper shade tree.

Question 2

Which characteristic defines a 'specimen plant' in landscape design?

Accepted Answer

Unique ornamental quality that draws attention

Answer

A specimen plant has a striking ornamental quality such as unusual form, color, texture, or bloom that makes it a focal point in the landscape.

Question 3

What is the term for the gradual transition from taller plants at the back to shorter plants at the front of a border?

Accepted Answer

Layering

Answer

Layering creates visual depth by placing tall plants at the rear, mid-sized plants in the middle, and low plants at the front.

Question 4

Which invasive grass species commonly encroaches into cool-season lawns and must be considered when specifying turf?

Accepted Answer

Bermudagrass

Answer

Bermudagrass spreads aggressively into cool-season lawns and is considered invasive outside its intended warm-season application zones.

Question 5

What are 'chill hours' in horticulture and why do they matter for plant selection?

Accepted Answer

Hours below 45F needed for fruit or flower production

Answer

Chill hours are cumulative hours at temperatures below 45 degrees F that deciduous fruit trees and some ornamentals need to break dormancy and bloom or fruit properly.

Landscape Design Practice Test

Landscape Design Practice Test

Landscape Design Plant Selection and Horticulture 2