The three-part examination covers a variety of subjects pertinent to the industry. The plants chosen for the Plant Identification portion are selected from the “CPH Plant List” which is included with the study materials purchased from WSNLA.
Photo ID will be required to take the exam.
Member & Student Rate: $90 | Non Member Rate: $160
Examinations are based on the Association’s study materials purchased through WSNLA and the “Sustainable Gardening” handbook available from WSU. Examinations are open to WSNLA members and non-members alike.
Information about the CPH exams.
Section 1 Plant Identification - 45 minutes
In this section, you will be asked to identify 40 live nursery samples by their botanical and common name. The plant samples will be nursery grown stock in containers or B&B. For 8 of these samples you will have to give more information. It will include 10 year Hheight under normal growing conditions (<1’, <6’, <10’, >10’,>20’, >35’), blooming time as two months (Jan-Feb, Feb-Mar, etc.) and color, best exposure, and if the plant is evergreen, semi-evergreen, or deciduous. After this section, the proctors will go over the plants so you will have some idea as to how well you did.
Section 2 General Knowledge - 50 minutes
This section has 100 multiple choice questions taken from information in the Sustainable Gardening manual available through WSU and from Naming of Plants study material from WSNLA. The goal is to test your understanding of horticulture on a variety of topics. Chapters that you will be tested on are: Botany, Soils and Fertilizers, Basic Entomology, Plant Disease, Diagnosing Plant Problems, Lawns, IPM, Weed Management, and Pruning.
Section 3 Landscape Practices - 50 minutes
This section includes 50 multiple choice questions related to landscape design and the installation and care of ornamental plants. Material is from the Sustainable Gardening manual chapters: Sustainable Landscape Design, Woody Landscape Plants, Herbaceous Ornamental Plants, Pruning, and Water Quality.
The second part of this section consists of a sample landscape design plan and 22 questions where you will choose the plant best suited for a particular location on the plan. The choice is based on the type of plant requested, sun/shade requirements and plant size at maturity. Note that design creativity and visual appeal are not considered.
The test will be graded by the proctors and WSNLA staff and you will be notified by mail of your results within 2-3 weeks.