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Dr. Jonathan M. Lehrer

Professor of Urban Horticulture and Design and Department Chair
Urban Horticulture and Design
 Thompson Room 202
 7:00am - 7:00pm


PhD Plant Science, University of Connecticut, 2007
MS Plant Science, University of Connecticut, 2002
BS in Biology, Cornell University, 1998


Jonathan M. Lehrer is native Long Islander with a passion for plants and a desire to share his knowledge by educating students and the general public. He is a member of the full-time faculty of the Department of Urban Horticulture and Design at Farmingdale State College since 2007 and in Fall 2015 assumed the role of department head. In addition to his duties at the College he serves on several long island committees that address the invasive plant issue and the selection of superior plant alternatives. Dr. Lehrer also enjoys lecturing publicly and writing on topics related to contemporary horticultural challenges.


Dr. Lehrer led the efforts of colleagues (2012-2015) to develop a rigorous scientific protocol to evaluate the invasive potential of cultivars. This novel approach has been adapted by both the Suffolk County Legislature and the NYS Department of Environmental Conservation to inform legislative decisions.

Selected Publications:
  • Brand, M.H., Lehrer, J.M., & Lubell, J.D. (2012) Fecundity of Japanese barberry cultivars and their ability to invade a deciduous woodland. Invasive Plant Science & Management, 5, 464-476.
  • Lubell, J.D., Brand, M.H., & Lehrer, J.M. (2011) Susceptibility of Eastern Ninebark (Phsocarpus opulifolius (L.) Maxim.) Cultivars to Powdery Mildew. Journal of Environmental Horticulture, 28(3), 187-189. 
  • Lehrer, J.M. & Brand, M.H. (2010) Purple-leaved Japanese barberry (var. atropurpure) genotypes become indistinguishable from green-leaved genotypes (Berberis thunderbergii D.C.) at low light levels. Journal of Environmental Horticulture, 28(3), 187-189.
  • Lehrer, J.M. Brand, M.H., & Lubell, J.D. (2008) Induction of tetraploidy in meristematically active seeds of Japanese barberry (Berberis thunderbergii var. atropurpurea) through exposure to colchicines and oryzalin. Scientia Horticulturae 119 (1), 67-71.
  • Lubell, J.D., Brand M.H., Lehrer, J.M., & Holsinger, K.E. (2008) Detecting the influence of ornamental Berberis thundergii var. atropurpurea in invasive populations of Berberis thundergii (Berberidaceae) using AFLP. American Journal of Botany, 95 (6), 700-705.

Selected Presentations 

  • Lehrer, J.M. (2014, July 18) Alternative to Invasives. Lecture presented for the 22nd Annual NYS ReLeaf Conference. Hempstead, NY.
  • Leherer, J.M. (2014, June 10) Assessing Invasiveness of Nonnative Plants in New York and Proposed Cultivar Assessment Protocol. Lecture and discussion presented for the Connecticut Invasive Plant Council. Storrs, CT.
  • Lehrer, J.M. (2014, May 20) Native Plants and Ecological Landscaping. Lecture presented for the Master Gardener Training for Cornell Cooperative Extension of Suffolk County. Great River, NY
  • Lehrer, J.M. (2014, April 8) Invasive Plants and Garden Thugs: The Makings of a Divisive Debate. Lecture presented for FSC School of Business Research Colloquim. Farmingdale, NY.
  • Lehrer, J.M. (2014, March 21) Useful Native Plants for Connecticut. Lecture presented for University of Connecticut Garden Conference. Storrs, CT. 


  • "Thermal Plant Printer Facilitates Horticulture Education at Farmingdale State College Via Marketing and Development Opportunities," Long Island Nursery and Landscape Association Innovative Grants Program, awarded Spring 2014, $1,618. 
  • "Implementation of a Permanent Plant Labeling System Within the Teaching Gardens at Farmingdale State College to Enrich Horticulture Student Education and Green Outreach Efforts," Long Island Nursery and Landscape Association Innovative Grants Program, awarded fall 2011, $800. 
  • "Enrichment of Horticulture Education through Student Involvement in Restoration of the Teaching Gardens Pinetum," Title III Students First Grant Program, administered by Dr. Beverly Kahn: awarded summer 2011, $2500.


HOR 211: Woody Plants I--Deciduous 
HOR 212: Woody Plants II-Evergreen
HOR 218: Indoor Plants
HOR 311: Woody Plants III--Advanced Topics
HOE 312: Selecting and Designing with Native Plants