Third Year


Third-year horticulture certificate program

Two semesters
September 2–December 16, 2015
January 27–May 4, 2016
Wednesdays, 8:30 am- 3:30 pm

$2,750; members $2,475
Call 215.278.7200 for more information.

All classes meet once a week in the 
Barnes Residence, 300 N. Latch’s Lane, Merion

Advanced Horticulture Practices
Instructor: Bruce Keyser, owner of Keyser Design Associates
28 weeks, 56 hours
In this hands-on class, learn about advanced propagation methods for woody plants, including propagating from seed, cuttings, and grafting. Study plant culture, and develop pruning techniques for all types of woody plants, including vines, trees, shrubs, and hedges. Understand the principles of hardscape construction, including ponds, walks, patios, and walls.

Landscape Design III
Instructor: Victor J. DePallo, AICP, RLA, licensed landscape architect and professional planner
28 weeks, 56 hours
Develop a personal design style through the study of landscape design. Learn how to conduct a site analysis, select appropriate plant materials, produce design drawings, and apply these skills to the design and execution of a small landscape design project. By evaluating various construction challenges of landscape design, students refine their skills and acquire a basic understanding of landscape construction. Emphasis is on problem-solving and cost-estimating related to the application of landscape and garden design. Students prepare an individual landscape plan for their final project.

Plant Pathology
Instructor: Mark Shaw, ISA Board Certified Master Arborist at Bartlett Tree Experts
7 weeks, 14 hours
Learn to identify signs and symptoms of woody plant diseases, including the most common biotic and abiotic diseases in the Delaware Valley. Emphases are the diagnostic process, the importance of performing a systematic assessment, and the concepts of abiotic disorder and predisposing stresses. The most commonly observed and serious plant disorders, diseases, insect pests, etc. will be discussed and observed in the field.


Instructor: Dr. Richard Bitner, horticulturist, author of Designing with Conifers and Conifers for Gardens: an Illustrated Encyclopedia
7 weeks, 14 hours
Learn to identify and classify a range of ornamental conifers, including the best species and cultivars for our region. This profusely illustrated course focuses on the major coniferous genera, highlighting identification, growth patterns, and landscape uses, from dwarf specimens for containers to large trees for screening. The instructor's Pocket Guide to Conifers is a required text.

Weed Science
Instructor: Scott Guiser, MS in Horticulture
7 weeks, 14 hours
Anywhere we cultivate plants, weeds exist. This course addresses the biology and classification of these unwanted plants and covers management options using an Integrated Pest Management approach. Learn about common weeds like crabgrass, poison ivy, and ragweed, and recent invasive species like mile-a-minute, Japanese stiltgrass, and giant knotweed.

Instructor: Dan Duran, PhD, Department of Biodiversity, Earth, and Environmental Sciences at Drexel University
7 weeks, 14 hours
This course introduces major topics in entomology. Students learn about the profound effects, both positive and negative, that insects have on natural ecosystems, human health, agriculture, and horticulture, with a focus on local insects whenever applicable. Students will be exposed to different aspects of plant-insect interactions ranging from pollination to pest control to conservation.
Register for this course on an audit basis.

View our non-discrimnation clause.

First and Second Year Courses

Course listings are available online for First-year and Second-year

Join Our Mailing List

Stay on top of the latest news, happenings and exclusive e-mail offers. Subscribe today.

Events at the barnes arboretum

See all upcoming events at the Barnes Arboretum.