Review Courses

In this section:

Review Sessions
Plant Identification Summer Course
Study Help

Review Sessions

This course reviews information in the manual for people who are taking the NHCLP. It is also open to non-exam takers.

The next Review Sessions are February 24, 26 and March 3, 5, 2015 at the Thompson School of Applied Science, Putnam Hall, UNH, Room 5, Durham.

Material covered:

  • Session 1: Botany, Soils, Fertilizers, Composting
  • Session 2: Plant Identification, Plant Nomenclature, Plant Hardiness, Native and Invasive Plants
  • Session 3: Turf, Planting Instructions, Plant Maintenance, Safety
  • Session 4: Landscape Design, Hardscape, Bidding and Estimating

Registration: Please register with Patty Laughlin, Lorax Landscaping, 603-303-0179,

Review Course Registration Form

Information on taking the NHCLP Exam


Plant Identification Summer Course
Offered at UNH

This course teaches the basics of plant identification and identification of each of the plants on the NHCLP (New Hampshire Certified Landscape Professional) Plant Identification List.  

The purpose is to teach plant materials to people who are new to the industry or people with little plant knowledge. The first class introduces students to methods of identification and plant families and the rest of the classes are spent identifying plant material. The NHCLP Plant Identification List covers a wide range of common plant materials used in the landscape industry.

Audience: This course is appropriate for anyone who wants to strengthen their plant material knowledge and is also designed to prepare people for the Identification portion of the NHCLP Exam. It is open to both members of NHLA and non-members.

Dates & Times: Thursdays 5:00 – 8:30 pm; June 12 – August 28 (12 weeks); optional review or practice exam on September 4th (to be decided by the class)

Location: Most classes will be held at The Thompson School of Applied Science, UNH, Durham. Some classes will be held at local nurseries and forestry sites.

Cost: $450.00 per student

Instructor: Dana M. Sansom; Associate Professor of Horticultural Technology, Thompson School of Applied Science.

Format: Students will learn the identifying features and landscape value of the plants on the Plant List in the Certification manual. There will be a quiz each week and a final exam.  Students will obtain a certificate if they obtain a 60% average. 

The Plant ID portion of the NHLA Certification exam is usually held a week or two after the end of this course.

To register: Send contact information and payment to:

NHLA Certification Committee
c/o Patty Laughlin
PO Box 253
Epping, NH 03042

Checks should be made out to NHLA with ‘Plant ID course’ on the memo line. Include names of those attending, company, address, phone number and e-mail address.

For more Information: Patty Laughlin, Lorax Landscaping, 603-303-01779, or Dana Sansom, 603-435-7216,

Study Help:

Private Tutoring Available: Contact Patty Laughlin for information and fees.

Click here to get study tips for learning your plants.


The plant identification list has been revised. The new list can be downloaded by clicking here, or from Patty Laughlin. The exam will be taken from the new list.

Horticopia (a plant database software program) can be purchased from There are many different versions but the Horticopia Professional Edition is $140.00 and has most of the plants on the NHCLP list except for weeds. It can also be used to make up plant info sheets for customers. also has pictures of the plants that you can access for free but there are usually just one picture for each plant.

Other good plant identification resources include Virginia Tech Fact Sheets:; UConn Plant Database:; Cornell Herbaceous Perennials:; and the Missouri Botanical Gardens Plant Finder: