Free Red Seal Landscape Horticulturist Examination Practice Questions

Sample Practice Questions

Try these 10 sample questions from the Red Seal Landscape Horticulturist Examination practice bank. Each includes the answer and explanation. Continue with the interactive practice above to review the full question set.

1. 1A landscape horticulturist checks the WHMIS classification of a product before use. Which pictogram corresponds to the product's classification as a Category 1 respiratory sensitizer?

   1. A.Exclamation mark
   2. B.Health hazardCorrect answer: B
   3. C.Skull and crossbones
   4. D.Corrosion

   Explanation: CCOHS states that "The health hazard pictogram is used for the following classes and categories:" including "Respiratory or skin sensitization – Respiratory sensitizer (Category 1, 1A and 1B)". The respiratory-sensitizer classification therefore corresponds to the health hazard pictogram.

   Reference: CCOHS WHMIS Pictograms — What pictograms are used with WHMIS hazard classes and categories? Health Hazard

2. 2While pruning a healthy shrub, a horticulturist shortens a healthy branch to a chosen bud to encourage new growth. Which type of pruning cut is being made?

   1. A.HeadingCorrect answer: A
   2. B.Thinning
   3. C.Cleaning
   4. D.Canopy raising

   Explanation: The standard defines heading as "cutting back the terminal portion of a branch to a bud." This describes the cut made on the shrub.

   Reference: Red Seal Occupational Standard – Landscape Horticulturist — Appendix C, heading

3. 3To locate an existing tree on a landscape base plan, a horticulturist measures from each of two fixed building corners to the tree's centre. What site-measurement method uses the two distances together to locate the tree?

   1. A.Baseline measurement
   2. B.Grid measurement
   3. C.Triangulation measurementCorrect answer: C
   4. D.Bearing-and-distance measurement

   Explanation: The University of Florida describes triangulation: "This method is used to determine the location of one point from two fixed or reference points." Here the two building corners provide those references for the tree location.

   Reference: University of Florida Landscape Design: Site Measurements and Base Maps — C. Triangulation Measurements

4. 4During landscape maintenance, a horticulturist encourages a shrub shoot to form roots while it remains attached to the parent plant. Which propagation method is being used?

   1. A.Division
   2. B.LayeringCorrect answer: B
   3. C.Seeding
   4. D.Cutting

   Explanation: The occupational standard defines layering as a "propagation method by which a branch/shoot takes root while still attached to the parent plant." That matches the attached shoot in the scenario.

   Reference: Red Seal Occupational Standard – Landscape Horticulturist — Appendix C, layering

5. 5A landscape worker needs to find the recommended first-aid measures after a product exposure. Which numbered section of the product's WHMIS safety data sheet is designated for first-aid measures?

   1. A.Section 5
   2. B.Section 6
   3. C.Section 8
   4. D.Section 4Correct answer: D

   Explanation: The CCOHS safety data sheet table identifies "4 First-aid measures" and describes first aid by route of exposure. The worker should consult section 4 for that information.

   Reference: CCOHS WHMIS Safety Data Sheet — What information is on the SDS? Section 4

6. 6A soil test for a landscape planting bed recommends raising a pH that is too low for the selected plants. Which material should the horticulturist consider mixing into the soil before planting?

   1. A.Elemental sulfur
   2. B.Iron sulfate
   3. C.Ground limestoneCorrect answer: C
   4. D.Ammonium sulfate

   Explanation: University of California IPM recommends, "To raise pH in the few landscape locations where pH is too low, mix appropriate amounts of finely ground limestone into soil before planting". The test recommendation provides the reason to raise pH; limestone is the amendment that does so.

   Reference: University of California IPM: pH Problems — Solutions

7. 7While laying out a rectangular planting area, a horticulturist marks 3 m on one side and 4 m on the adjoining side from their corner. What distance between the marks confirms a right angle?

   1. A.4 m
   2. B.5 mCorrect answer: B
   3. C.6 m
   4. D.7 m

   Explanation: The University of Florida describes "a 5 ft hypotenuse (long side of a right triangle) and 3 and 4 ft legs". The same ratio applies in metres: √(3² + 4²) = √25 = 5 m. Four metres uses just the longer leg; 6 m doubles the shorter leg; 7 m adds the two legs.

   Reference: University of Florida Landscape Design: Site Measurements and Base Maps — C. Triangulation Measurements, right-angle method

8. 8A nursery propagator lightly nicks the impermeable coat of a particular seed to allow water to enter. Which seed treatment is being performed?

   1. A.ScarificationCorrect answer: A
   2. B.Stratification
   3. C.After-ripening
   4. D.Gibberellic acid treatment

   Explanation: University of Florida Extension explains, "Scarification weakens a hard seed coat so water can enter." Stratification exposes seeds to specified moisture and temperatures; dry after-ripening and gibberellic acid are different dormancy treatments.

   Reference: University of Florida Extension: A Gardener’s Guide to Plant Propagation, Part III — When a Seed Isn’t Ready to Grow

9. 9A horticulturist sets a portable ladder against a stable wall. Its upper support is 4.8 m above level ground. Using the CCOHS 4-to-1 setup rule, how far should the ladder base be from the wall?

   1. A.0.6 m
   2. B.1.2 mCorrect answer: B
   3. C.2.4 m
   4. D.4.8 m

   Explanation: CCOHS says to use "the 4-to-1 Rule: For every 4 feet (1.2 metres) up, place the base of your ladder 1 foot (0.3 metres) from the wall". The horizontal distance is 4.8 m ÷ 4 = 1.2 m. The alternatives result from dividing by 8 (0.6 m), dividing by 2 (2.4 m), or using the full height (4.8 m).

   Reference: CCOHS Ladders - Portable — How should you set up the ladder?

10. 10A horticulturist compares two soil samples, one at pH 6 and one at pH 7. According to the logarithmic pH scale, how many times as many positively charged hydrogen ions are available at pH 6 as at pH 7?

    1. A.One tenth as many
    2. B.Ten times as manyCorrect answer: B
    3. C.One hundred times as many
    4. D.One thousand times as many

    Explanation: University of California IPM states that "ten times as many positively charged hydrogen ions are available at a pH 6 than at pH 7". One pH unit corresponds to a tenfold change; the lower-pH sample has the greater amount.

    Reference: University of California IPM: pH Problems — pH Problems, introductory explanation