Free Practice Questions for CNLP

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Key Facts: CNLP Exam

100

Practice Questions

OpenExamPrep

~100-120

Written Exam Questions

State associations

Plant ID

Separate Section Required

PlantNYS

~70%

Typical Passing Score

State associations

2 Parts

Written + Plant ID

PlantNYS

Horticulture

Professional Credential

State associations

The Certified Nursery & Landscape Professional (CNLP) is a professional horticulture certification administered by state nursery and landscape associations (such as PlantNYS and the Louisiana Nursery & Landscape Association). It has two parts: a written multiple-choice exam (commonly around 100-120 questions) and a separate plant identification section, with most associations requiring about 70% to pass each. Candidates study from the official CNLP Manual and review courses. Content spans woody-ornamental and plant identification by botanical name, soils and plant nutrition, plant health and integrated pest management, installation and maintenance practices, landscape design fundamentals, pesticide safety, and business and professionalism. This free prep includes 100 research-based practice questions with explanations and an AI tutor.

Sample CNLP Practice Questions

Try these sample questions to review concepts for the CNLP exam. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.

1A CNLP candidate is asked to identify a deciduous tree by its botanical name. The tree has opposite, palmately lobed leaves and produces winged samaras in pairs. To which genus does it belong?

A.Quercus

B.Acer

C.Fraxinus

D.Betula

Explanation: Maples belong to the genus Acer. They are distinguished by opposite leaf arrangement, palmately lobed leaves, and paired winged seeds (samaras), often called 'helicopters'. Recognizing opposite arrangement plus samaras is a classic CNLP plant-ID cue.

2On the CNLP plant identification list, the botanical name Cornus florida refers to which plant?

A.Red maple

B.Flowering dogwood

C.American holly

D.Eastern redbud

Explanation: Cornus florida is the flowering dogwood, a small understory tree prized for its spring bracts. Knowing genus-species pairings for the standard list is essential; Cornus is the dogwood genus and florida designates the flowering species.

3A plant has needles bundled in groups (fascicles) of two to five held together by a papery sheath at the base. This needle arrangement identifies which genus?

A.Picea (spruce)

B.Pinus (pine)

C.Tsuga (hemlock)

D.Abies (fir)

Explanation: Pines (Pinus) bear needles in bundles called fascicles, typically of 2, 3, or 5, wrapped by a basal sheath. Spruce, fir, and hemlock attach needles singly to the twig, so the fascicle is the key Pinus identifier.

4Which botanical term describes a leaf arrangement in which two leaves arise from the same node on opposite sides of the stem?

A.Alternate

B.Opposite

C.Whorled

D.Basal

Explanation: Opposite arrangement means two leaves emerge directly across from each other at the same node. Maples, ashes, dogwoods, and viburnums share this trait, making it a fast diagnostic split (remember the mnemonic MAD-Cap-Horse).

5The botanical name Ilex opaca describes American holly. The species epithet 'opaca' and the genus 'Ilex' are written using which convention?

A.Both words capitalized and italicized

B.Genus capitalized, species lowercase, both italicized

C.Both words lowercase and italicized

D.Genus lowercase, species capitalized, both underlined

Explanation: Binomial nomenclature capitalizes the genus, keeps the species epithet lowercase, and italicizes (or underlines) both words. Ilex opaca follows this Linnaean convention used throughout the CNLP plant list.

6A shrub on the ID list has compound leaves, fragrant white flower clusters in late spring, and is commonly grown for its heart-shaped foliage. Syringa vulgaris is the botanical name for which plant?

A.Common lilac

B.Forsythia

C.Mock orange

D.Privet

Explanation: Syringa vulgaris is the common lilac, valued for fragrant purple-to-white panicles in spring. Genus Syringa is the lilac group; vulgaris denotes the common species widely planted in landscapes.

7Which plant is correctly matched with its botanical name?

A.Eastern white pine - Pinus strobus

B.Norway spruce - Pinus nigra

C.Colorado blue spruce - Abies concolor

D.Douglas fir - Picea abies

Explanation: Eastern white pine is Pinus strobus, a five-needle pine. Matching common to botanical names accurately is core CNLP content, so memorize signature pairings like Pinus strobus for white pine.

8A landscaper must distinguish a true bud from a leaf scar when identifying a dormant deciduous twig in winter. The small mark left where a leaf detached, often showing bundle scars, is called the:

A.Lenticel

B.Leaf scar

C.Terminal bud

D.Node ridge

Explanation: A leaf scar is the mark left on the twig where the petiole abscised, frequently displaying vascular bundle scars whose number and pattern aid winter ID. Lenticels, in contrast, are corky pores for gas exchange.

9On the ID list, Thuja occidentalis is commonly known as:

A.Eastern red cedar

B.Arborvitae (Eastern white cedar)

C.Leyland cypress

D.Bald cypress

Explanation: Thuja occidentalis is arborvitae, also called Eastern white cedar, an evergreen with flat scale-like foliage in fan-shaped sprays. Eastern red cedar is a different genus (Juniperus virginiana).

10A perennial groundcover has glossy evergreen leaves and blue flowers and spreads by trailing stems. Vinca minor is the botanical name for which plant?

A.Pachysandra

B.Periwinkle (myrtle)

C.English ivy

D.Wintercreeper

Explanation: Vinca minor is periwinkle (common myrtle), a trailing evergreen groundcover with blue-violet flowers. Genus Vinca is distinct from Pachysandra, Hedera (ivy), and Euonymus (wintercreeper).

About the CNLP Exam

The Certified Nursery & Landscape Professional (CNLP) is a professional horticulture credential administered by state nursery and landscape associations such as PlantNYS and the LNLA. Candidates pass a written multiple-choice exam (commonly ~100-120 questions) plus a separate plant identification section, demonstrating mastery of plant ID, soils and nutrition, plant health and IPM, installation and maintenance, design, pesticide safety, and business professionalism.

Exam sponsor: State Nursery & Landscape Associations (e.g., PlantNYS, LNLA). The requirements and fees below concern the certification or admission exam, separate from our free practice resources.

Assessment

A written multiple-choice exam (commonly ~100-120 questions) plus a separate plant identification section; both must be passed. Counts, time, and fee vary by state association. This practice bank is 100 selected-response items.

Time Limit

Varies by association (commonly a half-day proctored session)

Passing Score

Commonly 70% per section (set by each state association)

Exam / Certification Fees

Varies by state association; typically ~$100-$300 including the manual (member discounts apply)

Exam sponsor website

Fees, eligibility, and exam policies can change. Confirm them with the exam sponsor before applying or paying.

Official sources

Our practice resources: topics covered

We aim to reflect publicly available exam outlines and topic information in our study resources. Coverage, format, and difficulty may differ from the actual exam, and we cannot guarantee that every detail is accurate or current. Confirm exam requirements, fees, and policies with the official exam sponsor.

25%

Plant & Woody-Ornamental Identification

Trees, shrubs, conifers, groundcovers, perennials, and grasses by common and botanical names, leaf/needle morphology, plant families, cultivars, hardiness zones, and the plant ID section

18%

Soils & Plant Nutrition/Fertility

Soil texture and structure, pH and amendments, CEC, macro- and micronutrients, fertilizer analysis (N-P-K), deficiency symptoms, organic matter, and soil biology

17%

Plant Health & Integrated Pest Management

IPM principles, pest ID and monitoring, action thresholds, the disease triangle, insect damage, common fungal and bacterial diseases, and cultural/biological/mechanical/chemical controls

20%

Installation & Maintenance Practices

Planting depth and root flare, B&B and container installation, mulching, pruning and the branch collar, irrigation, staking, transplanting, winter protection, and turf care

10%

Landscape Design Fundamentals

Design principles, color theory, plan reading and scale, right plant right place, native and sustainable design, grading, and stormwater features

10%

Pesticide Safety, Business & Professionalism

Pesticide labels, signal words, FIFRA, REI and PPE, drift, herbicides, plus estimating, insurance, OSHA/SDS, calling 811, nursery standards, and invasive-species awareness

Preparing for the CNLP Exam

What You Need to Know

Passing score: Commonly 70% per section (set by each state association)
Assessment: A written multiple-choice exam (commonly ~100-120 questions) plus a separate plant identification section; both must be passed. Counts, time, and fee vary by state association. This practice bank is 100 selected-response items.
Time limit: Varies by association (commonly a half-day proctored session)
Exam / certification fees: Varies by state association; typically ~$100-$300 including the manual (member discounts apply) Official sources

Using Our Practice Resources

Work through all 100 available questions
Review every answer and explanation
Track weak areas and revisit them
Use our AI tutor for tough concepts

CNLP: Suggested Study Strategy

1Weight your study toward plant and woody-ornamental identification, the largest domain, and memorize botanical (binomial) names for the plant ID section

2Learn diagnostic shortcuts: opposite vs alternate leaves, needles in bundles (Pinus) vs single needles, and winter twig clues like leaf scars and pith

3Master soil basics, the N-P-K fertilizer analysis, soil pH adjustment (sulfur lowers, lime raises), and nutrient deficiency symptoms

4Know the IPM sequence (identify and monitor first, treat at the action threshold) and the disease triangle of host, pathogen, and environment

5Practice correct installation rules: plant at the root flare, dig wide not deep, mulch 2-4 inches away from the trunk, and prune at the branch collar

6Complete all 100 practice questions and review every miss with the AI tutor before sitting your association's exam

Frequently Asked Questions

What is the CNLP exam and who administers it?

The Certified Nursery & Landscape Professional (CNLP) is a professional horticulture credential administered by state nursery and landscape associations such as PlantNYS and the Louisiana Nursery & Landscape Association. It validates broad knowledge across plant identification, soils, plant health, installation, design, and business.

How many questions are on the CNLP exam and what is the passing score?

Because each state association administers its own version, the exact count varies, but the written exam commonly has roughly 100-120 multiple-choice questions plus a separate plant identification section. Most associations require about 70% to pass each section.

What topics does the CNLP exam cover?

It covers plant and woody-ornamental identification (including botanical names), soils and plant nutrition, plant health and integrated pest management, installation and maintenance practices, landscape design fundamentals, pesticide safety, and business and professionalism.

Is there a plant identification section on the CNLP exam?

Yes. In addition to the written multiple-choice test, the CNLP includes a separate plant identification component in which candidates identify plants by common and botanical name. Both the written and plant ID portions must be passed to earn certification.

How should I study for the CNLP exam?

Study from the current CNLP Manual and consider a review course offered by your state association or extension. Focus heaviest on plant identification and woody ornamentals, then soils, IPM, and installation. Use these 100 free practice questions and the AI tutor to find and fix knowledge gaps.

Is this free CNLP practice as good as paid prep?

Our 100 practice questions span every CNLP content domain with a teaching explanation for every answer plus free daily AI tutor interactions. All content is free forever and updated for 2026, complementing the official CNLP Manual.