Instructor Bios

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Drew Jeffers

Drew is a native of the mountains of eastern Tennessee. I have a B.S. in Agriculture “ Plant and Soil Science, and M.S. in Plant and Soil Science from the University of Tennessee. My thesis project focused on woody tree and shrub liner production. I have worked as an herbaceous perennial grower for Zelenka Nurseries, a production manager for Brussel's Bonsai Nursery, a bedding plant grower for Van Wingerden International, and an Integrated Pest Management (IPM) coordinator for Costa Farms - Costa Carolina. His primary interests are in Integrated Pest Management (IPM), herbaceous perennial production and cultivation, annual and bedding plant production and cultivation, woody ornamental (tree and shrub) production and cultivation, plant growth regulator techniques and combinations, and minimizing ornamental production and cultivation impacts to water and other natural resources.


Paul Thompson

Paul is a Distinguished Urban Horticulture Agent in York, Chester and Lancaster Counties. I am a Certified Nursery Professional with the SC Nursery and Landscape Association. I coordinate the Master Gardener Program and conduct educational programs for consumers and horticulture professionals. I write a monthly garden column for YC Magazine, a quarterly column for SC Farmer's magazine, and am a regular guest on SCETV's Making it Grow. I have received many awards for programming and communication efforts through national and state peer associations to include the 2015 Distinguished Service Award.

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Jackie Jordan

Jackie is a Horticulture Extension Agent with a focus on urban horticulture. She offers programs on ornamental horticulture, turfgrass management, community gardening and pesticide safety. She advises specialty crop growers, landscape professionals, greenhouse and nursery producers as well as home owners. You might recognize Jackie from her frequent appearances as a panelist on Making It Grow!, SCETV’s award-winning gardening program. She also writes the Weed of the Month for Clemson's Home Garden Information Center In the Garden Blog. She enjoys helping clients trouble-shoot their insect, disease and nutritional problems in lawns, landscapes and gardens and coordinating the Master Gardener volunteer training program.


Vicky Bertagnolli

Vicky is the Consumer Horticulture Agent, Master Gardener Coordinator, and local a bug geek in Aiken County. Prior to joining Clemson as an Extension Agent in January 2008, Vicky spent seven years as a Research Technician for Auburn University's Alabama Fire Ant Management Program and also worked part-time for a pest control company. Vicky's areas of expertise are Imported Fire Ants and Management, Insect Identification, and Urban Pest Management using Integrated Pest Management (IPM). Vicky conducts Master Gardener Training Courses in Aiken County, is the Private Pesticide Applicator Training Coordinator in Aiken County, is a Coordinator for the Commercial Pesticide Applicator Licensing Prep Course, and makes regular appearances on SCETV's Making It Grow. Vicky holds a B.S. in Wildlife Sciences from Auburn University and was awarded her M.S. in Entomology from Auburn University August 6, 2016.

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Terasa Lott

Passionate about natural resources stewardship, Terasa has been responsible for water resources programming in Florence and Darlington Counties since April of 2010 and was named State Coordinator of the South Carolina Master Gardener Program in January of 2018. During her career, environmentally friendly landscaping has been a major program focus. Terasa's outreach efforts via television have made her a recognizable and trusted source of both horticulture and water resources information across the state. Terasa's primary focus is coordination of the SC Master Gardener Program which trains, selects, and utilizes knowledgeable volunteers to facilitate the educational work of the local Consumer Horticulture Agent, by delivering researched-based information to citizens of the state. She also coordinates Carolina Yards, a program designed to assist and guide South Carolina homeowners in conserving water in the landscape and in making positive changes in the environmental quality of their yards, neighborhoods, and surrounding waterways.


Guinn Wallover

Guinn serves as a Water Resources Extension Agent for the coastal district and serves as coordinator of the Master Pond Manager program. Guinn is the Coordinator for the Berkeley County Extension Office. Guinn's areas of interest include pond management, surface water and groundwater monitoring and water quality analysis. Guinn is a member of the South Carolina Association of Stormwater Managers, American Water Resources Association, and South Carolina County Agricultural Agent Association. She is a Non-Commercial Pesticide Licensed Applicator, SC Stormwater BMP Inspection and Maintenance Inspector, NC Stormwater BMP Inspection and Maintenance Certified Professional, and SC Certified Erosion Prevention and Sediment Control Inspector.

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Jordan Franklin

Jordan is the Consumer Horticulture Agent and Master Gardener Coordinator for Greenville County. He earned his B.S. in Horticulture from Clemson University; and possesses nearly 20 years of experience in ornamental horticulture. Prior to being employed with Clemson Extension, Jordan served 10 years as Public Garden Manager for Falls Park on the Reedy directing landscape maintenance operations for beautiful downtown Greenville and the highly-acclaimed Falls Park on the Reedy. His extension responsibilities include answering homeowner horticulture questions; coordinating and teaching master gardener students; providing content for the Home and Garden Information Center; providing seasonal horticultural programming for homeowners; and making occasional appearances on Making It Grow!. Jordan enjoys helping others to improve their gardening and landscaping knowledge.


Mark Arena

Mark Arena has a Master’s degree in horticulture, five years being an owner operate of a landscape design and construction company and 22 years of experience with Clemson University Cooperative Extension Service.

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Sarah White, PhD

White and a national team of researchers from 10 other universities received $8.2 million in funding in September 2014 from USDA-Specialty Crops Research Initiative to evaluate Clean Water - Reduce, Remediate, recycle: Informed Decision-Making to Facilitate Use of Alternative Water Resources and Promote Sustainable Specialty Crop Production. White is Project Director for this grant. White manages and conducts research projects and conveys information related to water management, water quality (chemical and biotic parameters), ecologically based treatment technologies, and integrated pest management to green industry stakeholders. Investigates the applications of vegetation-based technologies (constructed wetlands, floating treatment wetlands, and vegetated buffers) for cleansing agrichemicals from encouraging reuse of production runoff. White is working with the Clean Water3 team to develop information resources for growers to help them make informed decisions related to water management and treatment. Since 2014 the team has published 37 trade articles, 13 extension documents, 29 conference proceedings, and 61 journal articles; released 1 smart-phone application and 2 decision support tools; and made 162 presentations (professional and grower conferences and webinars). White also works with the Southern Nursery Integrated Pest Management (SNIPM) working group to collaboratively develop Extension resources related to nursery crops, pests, and their management. They have released 3 books, 2 smart-phone applications (IPMPro, IPMLite), and multiple extension documents.


Kerrie Roach

Kerrie Roach is the Commercial Fruit and Vegetable Horticulture Agent with Clemson Extension covering Oconee, Pickens, and Anderson Counties. She has been with Extension for over 11 years. After receiving her Bachelors of Science in Horticulture and Masters of Agricultural Education from Clemson, Kerrie began her career in 2009 with NC State Extension, she then transferred to Clemson Extension in 2016. Kerrie's responsibilities have covered home/consumer horticulture, 'green industry horticulture, the Extension Master Gardener program, and commercial production of fruits and vegetables. Kerrie's passion lies in woody tree physiology and pruning. She and her husband, Zack, reside in Seneca, SC where they raise their two children and dabble in farm life.

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