Master Gardener Exam With Actual
Questions & Verified Answers ,Plus
Explained Rationales/Expert Verified
For Guaranteed Pass 2026/Latest
Update/Instant Download Pdf
MASTER GARDENER EXAM
1. Which soil texture has the highest water-holding capacity?
A. Sand
B. Loam
C. Clay
D. Silt
Clay particles are tiny and hold more water due to greater
surface area.
2. Which nutrient is most associated with root development?
A. Nitrogen
B. Phosphorus
C. Potassium
D. Magnesium
Phosphorus drives root growth and energy transfer.
3. A soil pH of 5.0 indicates what?
A. Neutral soil
B. Slightly alkaline soil
C. Acidic soil
, D. Highly alkaline soil
pH below 7 is acidic.
4. Which organism is the primary decomposer in compost?
A. Termites
B. Ants
C. Microorganisms
D. Slugs
Bacteria dominate decomposition.
5. Which irrigation method conserves water most effectively?
A. Sprinkler
B. Flood irrigation
C. Drip irrigation
D. Overhead watering
Drip minimizes evaporation and runoff.
6. Chlorosis is usually caused by which deficiency?
A. Nitrogen
B. Potassium
C. Iron
D. Calcium
Iron deficiency commonly leads to yellowing leaves with green
veins.
7. A plant labeled “full sun” typically requires:
A. 2–4 hours
B. 4–6 hours
C. 6+ hours
D. Constant light
Full sun means at least 6 hours of direct light.
8. Which is a cool-season crop?
A. Tomato
, B. Pepper
C. Broccoli
D. Eggplant
Brassicas thrive in cooler temperatures.
9. The ideal C:N ratio for composting is:
A. 5:1
B. 10:1
C. 30:1
D. 50:1
30:1 promotes efficient microbial breakdown.
10. Which insect is a beneficial predator?
A. Aphid
B. Whitefly
C. Japanese beetle
D. Lady beetle
Lady beetles devour aphids and soft-bodied pests.
11. Powdery mildew thrives in:
A. Hot, dry, still air
B. Cool nights and warm days
C. Heavy rain
D. Constant wind
Classic powdery mildew cycle.
12. What is the primary function of mulch?
A. Speed growth
B. Fertilize plants
C. Suppress weeds and regulate moisture
D. Increase soil pH
Mulch reduces evaporation and blocks weed germination.
Questions & Verified Answers ,Plus
Explained Rationales/Expert Verified
For Guaranteed Pass 2026/Latest
Update/Instant Download Pdf
MASTER GARDENER EXAM
1. Which soil texture has the highest water-holding capacity?
A. Sand
B. Loam
C. Clay
D. Silt
Clay particles are tiny and hold more water due to greater
surface area.
2. Which nutrient is most associated with root development?
A. Nitrogen
B. Phosphorus
C. Potassium
D. Magnesium
Phosphorus drives root growth and energy transfer.
3. A soil pH of 5.0 indicates what?
A. Neutral soil
B. Slightly alkaline soil
C. Acidic soil
, D. Highly alkaline soil
pH below 7 is acidic.
4. Which organism is the primary decomposer in compost?
A. Termites
B. Ants
C. Microorganisms
D. Slugs
Bacteria dominate decomposition.
5. Which irrigation method conserves water most effectively?
A. Sprinkler
B. Flood irrigation
C. Drip irrigation
D. Overhead watering
Drip minimizes evaporation and runoff.
6. Chlorosis is usually caused by which deficiency?
A. Nitrogen
B. Potassium
C. Iron
D. Calcium
Iron deficiency commonly leads to yellowing leaves with green
veins.
7. A plant labeled “full sun” typically requires:
A. 2–4 hours
B. 4–6 hours
C. 6+ hours
D. Constant light
Full sun means at least 6 hours of direct light.
8. Which is a cool-season crop?
A. Tomato
, B. Pepper
C. Broccoli
D. Eggplant
Brassicas thrive in cooler temperatures.
9. The ideal C:N ratio for composting is:
A. 5:1
B. 10:1
C. 30:1
D. 50:1
30:1 promotes efficient microbial breakdown.
10. Which insect is a beneficial predator?
A. Aphid
B. Whitefly
C. Japanese beetle
D. Lady beetle
Lady beetles devour aphids and soft-bodied pests.
11. Powdery mildew thrives in:
A. Hot, dry, still air
B. Cool nights and warm days
C. Heavy rain
D. Constant wind
Classic powdery mildew cycle.
12. What is the primary function of mulch?
A. Speed growth
B. Fertilize plants
C. Suppress weeds and regulate moisture
D. Increase soil pH
Mulch reduces evaporation and blocks weed germination.
