Certified Landscape Technician Exam
Practice Questions And Correct Answers
(Verified Answers) Plus Rationales 2026
Q&A | Instant Download Pdf
1. Which of the following is the best method to improve soil drainage in
heavy clay soil?
A. Add peat moss
B. Add sand
C. Incorporate organic matter
D. Increase irrigation
Rationale: Organic matter improves soil structure, increasing
aeration and drainage, unlike sand, which may worsen compaction
in clay soils.
2. When installing a new turf area, what is the ideal soil pH range for
most grass species?
A. 4.5–5.0
, B. 5.0–5.5
C. 6.0–7.0
D. 7.5–8.0
Rationale: Most turf grasses grow best in slightly acidic to neutral
soil (6.0–7.0).
3. Which irrigation system is most water-efficient for shrubs in a
landscaped area?
A. Sprinkler
B. Drip irrigation
C. Flood irrigation
D. Soaker hose
Rationale: Drip irrigation delivers water directly to the root zone,
reducing evaporation and runoff.
4. What is the primary function of mulch around plants?
A. Attract insects
B. Conserve soil moisture and regulate temperature
C. Provide nutrients immediately
D. Replace fertilization
Rationale: Mulch conserves moisture, regulates soil temperature,
and reduces weed growth; nutrient contribution is minimal unless
organic mulch decomposes over time.
5. Which pruning cut removes a branch at its point of origin?
A. Heading cut
, B. Thinning cut
C. Topping cut
D. Shearing cut
Rationale: Thinning cuts remove a branch at the main stem or parent
branch to improve structure without stimulating excessive growth.
6. What is the primary cause of chlorosis in landscape plants?
A. Overwatering
B. Nutrient deficiency, particularly iron
C. Pruning
D. Excess sunlight
Rationale: Chlorosis often results from iron or other micronutrient
deficiencies, causing yellowing between leaf veins.
7. What is the recommended mowing height for cool-season turf grasses
like Kentucky bluegrass?
A. 0.5–1 inch
B. 1–2 inches
C. 2–3 inches
D. 4–5 inches
Rationale: Maintaining 2–3 inches reduces stress, encourages root
growth, and shades soil to retain moisture.
8. When laying sod, which technique ensures proper root-to-soil
contact?
A. Water immediately after installation without pressing
, B. Roll or tamp sod lightly after placement
C. Leave gaps between sod pieces
D. Fertilize heavily before watering
Rationale: Rolling or tamping sod ensures good soil contact, which is
essential for root establishment.
9. Which landscape plant is considered drought-tolerant once
established?
A. Azalea
B. Fern
C. Lavender
D. Impatiens
Rationale: Lavender is native to Mediterranean climates and
tolerates low water conditions.
10. What type of fertilizer releases nutrients slowly over time?
A. Liquid fertilizer
B. Water-soluble fertilizer
C. Controlled-release fertilizer
D. Foliar fertilizer
Rationale: Controlled-release fertilizers gradually release nutrients,
reducing leaching and improving efficiency.
11. Which of the following is a common symptom of overwatering in
shrubs?
A. Wilting
Practice Questions And Correct Answers
(Verified Answers) Plus Rationales 2026
Q&A | Instant Download Pdf
1. Which of the following is the best method to improve soil drainage in
heavy clay soil?
A. Add peat moss
B. Add sand
C. Incorporate organic matter
D. Increase irrigation
Rationale: Organic matter improves soil structure, increasing
aeration and drainage, unlike sand, which may worsen compaction
in clay soils.
2. When installing a new turf area, what is the ideal soil pH range for
most grass species?
A. 4.5–5.0
, B. 5.0–5.5
C. 6.0–7.0
D. 7.5–8.0
Rationale: Most turf grasses grow best in slightly acidic to neutral
soil (6.0–7.0).
3. Which irrigation system is most water-efficient for shrubs in a
landscaped area?
A. Sprinkler
B. Drip irrigation
C. Flood irrigation
D. Soaker hose
Rationale: Drip irrigation delivers water directly to the root zone,
reducing evaporation and runoff.
4. What is the primary function of mulch around plants?
A. Attract insects
B. Conserve soil moisture and regulate temperature
C. Provide nutrients immediately
D. Replace fertilization
Rationale: Mulch conserves moisture, regulates soil temperature,
and reduces weed growth; nutrient contribution is minimal unless
organic mulch decomposes over time.
5. Which pruning cut removes a branch at its point of origin?
A. Heading cut
, B. Thinning cut
C. Topping cut
D. Shearing cut
Rationale: Thinning cuts remove a branch at the main stem or parent
branch to improve structure without stimulating excessive growth.
6. What is the primary cause of chlorosis in landscape plants?
A. Overwatering
B. Nutrient deficiency, particularly iron
C. Pruning
D. Excess sunlight
Rationale: Chlorosis often results from iron or other micronutrient
deficiencies, causing yellowing between leaf veins.
7. What is the recommended mowing height for cool-season turf grasses
like Kentucky bluegrass?
A. 0.5–1 inch
B. 1–2 inches
C. 2–3 inches
D. 4–5 inches
Rationale: Maintaining 2–3 inches reduces stress, encourages root
growth, and shades soil to retain moisture.
8. When laying sod, which technique ensures proper root-to-soil
contact?
A. Water immediately after installation without pressing
, B. Roll or tamp sod lightly after placement
C. Leave gaps between sod pieces
D. Fertilize heavily before watering
Rationale: Rolling or tamping sod ensures good soil contact, which is
essential for root establishment.
9. Which landscape plant is considered drought-tolerant once
established?
A. Azalea
B. Fern
C. Lavender
D. Impatiens
Rationale: Lavender is native to Mediterranean climates and
tolerates low water conditions.
10. What type of fertilizer releases nutrients slowly over time?
A. Liquid fertilizer
B. Water-soluble fertilizer
C. Controlled-release fertilizer
D. Foliar fertilizer
Rationale: Controlled-release fertilizers gradually release nutrients,
reducing leaching and improving efficiency.
11. Which of the following is a common symptom of overwatering in
shrubs?
A. Wilting
