CLA CLA Plant Materials & Horticulture

Question 1

Which USDA Plant Hardiness Zone covers most of the US Gulf Coast, including southern Louisiana and Mississippi?

Accepted Answer

Zone 9a

Answer

Zone 5b

Answer

Zone 7a

Answer

Zone 11a

Question 2

What is the botanical name for Eastern Redbud, a commonly specified native flowering tree in the eastern US?

Accepted Answer

Cercis canadensis

Answer

Cornus florida

Answer

Acer rubrum

Answer

Amelanchier arborea

Question 3

A plant specification calls for '3" Cal.' What does 'Cal.' indicate on a plant schedule?

Accepted Answer

Caliper (trunk diameter) measured 6 inches above grade

Answer

Height in feet

Answer

Container size in gallons

Answer

Canopy spread in feet

Question 4

Which soil pH range is generally considered optimal for most landscape plants?

Accepted Answer

5.5–6.5

Answer

4.0–5.0

Answer

7.5–8.5

Answer

8.5–9.5

Question 5

What does the term 'B&B' mean when specifying trees on a planting plan?

Accepted Answer

Balled and burlapped

Answer

Branch and bark condition

Answer

Bare and bounded

Answer

Bundle and boxed

Question 6

Which plant characteristic is described as 'stoloniferous'?

Accepted Answer

Spreads by horizontal above- or below-ground runners

Answer

Produces aerial roots

Answer

Has needle-like leaves

Answer

Tolerates full shade only