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ASHS Certified Horticulturists
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The American Society for Horticultural Science Certified Horticulturist (ASHS-CH) professional certification program is the national credential validating the knowledge and skills of working horticultural practitioners in the industry of horticulture.

United States


Parker Filer, CH
Tucson, Arizona

Daryan Godfrey, CH
Tucson, Arizona

Edward Tashian, CH
Phoenix, Arizona


Ralph Crevoshay, CH
San Diego, California


Bridey Denniger, CH
Lakewood, California


James Jones, CH
Atwater, California


Stephen Schwager, CH
Mill Valley, California


Jonathan Sinclair, PhD, CH
San Juan Bautista, California

"I graduated with a PhD from Texas A&M University in 2003 and have built on the training I received there ever since in my professional career as a plant breeder. Completing the Certified Horticulture certification has been a good way to maintain a high-quality knowledge base in various other areas of Horticulture as well."


Sean Band, CH
Golden, Colorado


Catherine DeFotis, CH
Englewood, CO


Joseph Egolf, CH
6692A Lancaster Pike
Hockessin, DE 19707

District of Columbia

Gabriel Bandele, CH 
PO Box 21540 
Washington, DC 20009

"We are nature (not just a part of it). As horticulturists, we co-create with the plants we work with. We can become stewards of the earth and by assisting others in heightening their awareness and appreciation of our plant/natural environment we can also become part of the much needed solution."


Edward Schneider, CH 
Orange Park, Florida

Arielle Simon, CH 
Key Biscayne, Florida

Stacy Smith, CH 
Lakeland, Florida


Peter Calabrese, CH
931 Monroe Drive NE Ste A102-257
Atlanta, Georgia 30308



Thomas Thompson, CH
Kekeha, Hawaii



Miranda Milligan, CH
Victor, Idaho


Nathan Bair, CH
Normal, IL


Charlotte Blome, CH
Crystal Lake IL


Kevin Donnelly, CH 
223 E. Forest Knoll Drive 
Palatine, IL 60074

As Quality Control supervisor at Midwest Trading Horticultural Supplies, Inc., he oversees testing and research on horticultural soils for the greenhouse, nursery, landscape, and green roof market. In addition, Donnelly gives educational tours of the facility to customers, students, industry groups and the occasional foreign dignitary.


Breanne Heath, CH
Growing Home, Inc.
Wood Street Urban Farm
5814 S. Wood St.
Chicago, IL 60636

Breanne has a bachelor's degree in biology and works as a field training specialist at a certified organic farm on the south side of Chicago. There, she teaches people with barriers to employment in agricultural and horticultural techniques, while managing the grounds and a production plot for a family shelter, soup kitchen and food pantry. Breanne also teaches community workshops in growing and food preservation while maintaining her own rooftop farm and chickens in the city.


Stephanie Stacy, CH
Ottawa, IL

Stephanie has been in the industry since 1998, starting at a small, family garden center and growing to owning Garden's Gate Garden Center and Landscaping in Ottawa, IL, along with her husband, Dave. In addition, Stephanie teaches classes at Illinois Valley Community College and offers hands-on seminars to adults and children at her garden center.


David Pilkington, CH
Chicago, Illinois


Raju Manchakkal Thupran, CH
Eastern Illinois University

Experienced Landscape Architect, GIS Analyst and Certified Horticulturist with a demonstrated history of working in the brand new Smart Cities and Mega Urban Planning/Landscaping/Infrastructure industries. Skilled in AutoCAD, ArcGIS, R, SPSS, Tableau Desktop, Microsoft Office and Adobe Creative Suite. Trained in professional golf turf management at Rutgers, and Urban environmental management from WWF. Raju has a Bachelor's degree in agriculture, and a Masters in journalism and mass communication. He has 20 years of diversified work experience in agricultural extension, farming, facilities, desert landscaping, and ornamental horticulture. Author of "The Green Earth", a text book for vocational higher secondary agriculture education. Raju was a Horticulture Specialist at King Abdullah University of Science and Technology in the Kingdom of Saudi Arabia, and horticulturist for Dorsch Qatar.



Blake Lange, CH
Porter, Indiana


Barbara L. Fuelberth, CH
1607 280th Avenue
Spirit Lake, IA 51360
W 712-336-2085; F 712-336-8118

She received her Master Gardener training and began working at Ferguson's Garden Center in Spirit Lake, Iowa, as a summer job. In 2009, she started full-time at Ferguson's and became Nursery Manager in November of 2010.


David Evans, CH
Taneytown, Maryland


Amanda Helin, CV
Hyattsville, Maryland

Nicholas Lazio, CH
Hyattsville, Maryland


Robert Dowell, CH
Roslindale, Massachusetts


Timothy Harrison, CH
, Massachusetts


Rebecca Rondeau, CH
North Chelmsford, Massachusetts


Mike Belco, CH
1400 East Kearsley Street
Flint, MI 48503

Mike is the Integrated Pest Management Specialist at Applewood, the 34 acre C.S. Mott estate in Flint, MI. He performs a wide variety of horticultural duties, including caring for the bowling green, the broadleaf evergreen collection, the foliage shade garden, the hydrangea collection, the apple orchard, and the diversity garden that attracts beneficial insects to the orchard. Environmental stewardship is a top priority for Applewood, and Mike leads the estate’s efforts to promote plant health while respecting nature and the environment. He also presents educational information to visitors and community gardening groups on environmentally friendly gardening practices, landscape plant maintenance and landscape design.

He says, “I’m proud to be a new member of the ASHS Certified Horticulturist group, and look forward to learning more about the organization and how it can help me to share horticultural knowledge with my associates and our visitors.”

Andrew D. Ewing, CH

1400 E. Kearsley St., Flint, MI 48503

 Andrew Ewing earned a BS in horticulture from Michigan State University and works as a horticulturist at the Applewood Estate in Flint, MI. Applewood is the 36 acre historic estate of Charles Stewart Mott, a pioneer of the automobile industry.


Abigail Debner, CH
Winsted, Minnesota



Kristina Haines, CH
St. Louis, MO


Mary Lyon, CH
St. Louis, MO


Michele Chambliss, CH
2764 N. Green Valley Parkway, Ste 339
Henderson, NV 89014

With 20 years horticultural experience, Michele works as a consultant,“plant-driven” designer, and owner of Perennial Garden Consultants in Las Vegas, NV. She specializes in bringing horticulturally-sound design and maintenance to homeowners facing the unique climatic, soil, and plant-selection challenges that landscaping in the Mojave Desert presents. She publishes a seasonal ezine for subscribers, (, is a regular contributor to Perennial Garden Consultants’ blog “Designer’s Notebook,” and advocates for the use of native plants in residential landscapes.



Ian M. Ford-Terry, CH
University of Nevada Cooperative Extension
Las Vegas, Nevada

Christopher James, CH
Las Vegas, Nevada

Heidi A. Kratsch
Reno, Nevada
University of Nevada Cooperative Extension

"This [ASHS Certified Horticulturist designation] reaffirms my commitment to professionalism in horticulture. I hope to inspire my clients and students to become active in professional organizations and to become lifelong learners."


Lori M. Leas, CH
University of Nevada Cooperative Extension
Las Vegas, Nevada


Andrea Meckley, CH
PO Box 984
Logandale, NV 89021

New Jersey

Daniel Cohen, CH 
Elberon, NJ

Kristopher Brandyberry, CH 
Elberon, NJ

Sandra Carr, CH 

Craig Dupee, CH 
Trenton, NJ


Molly Gearty, CH 
Lincroft, NJ

Victoria Kayes, CH
Woodbridge Twp, NJ


Michael Monzon, CH
Parlin, NJ


Matt O’Neal, CH
Neshanic Station, NJ


James Robinson, CH
Fairton, NJ

Alexandra Verello, CH
Highland Park, NJ

Kayla Weiss, CH
Highland Park, NJ

New York

Pilar Altares, CH
Brooklyn, New York

Kim Eierman, CH
2 Deshon Avenue
Bronxville, New York 10708

Kim is an environmental horticulturist specializing in eco-beneficial landscapes and native plants. In addition to consulting with clients on best practices for ecological design and plant selection, she speaks, writes and teaches on these topics. Kim is an instructor at New York Botanical Garden and Brooklyn Botanic Garden. She is an Adjunct Professor at Westchester Community College’s “Go Native U”, administered by the Native Plant Center, and is an active speaker for garden clubs, nature centers, Audubon chapters, and beekeepers.


Elli Mazeres, CH
Peekskill, New York

James Newman, CH
Floral Park, N.Y.

Following a virtually lifelong interest in gardening and many years working in an unrelated field, Jim Newman graduated from Farmingdale State College with an A.A.S. Degree in Ornamental Horticulture.  He currently works for the Fanny Dwight Clark Memorial Garden, Inc., a non-profit organization founded to support, enhance and preserve Clark Botanic Garden in Albertson, N.Y.  Jim enjoys managing the greenhouse at Clark Garden as well as performing many other and varied tasks needed to support a public garden.  He also enjoys interacting with garden volunteers and visitors to the garden seeking information about the diverse garden plantings.

Rae Schraver, CH
Buskirk, New York


Audra Star, CH
Waterville, New York


Kathryn Straight, CH
Lyons, New York


Peter Strom, CH
7 Fowler Avenue
Ossining, NY 10562

Peter is the owner of Strom Horticultural Services, a residential fine gardening company. He is an ISA Certified Arborist. He enjoys pruning woody plants as well as design and care of gardens with spring blooming bulbs, perennials and choice annuals. When not in the garden he enjoys hiking in the Hudson Highlands or touring gardens in the U.S. and abroad.


Jeb Stuart-Bullock, CH
Joy of Gardening, Proprietress
Garden Design and Maintenance
Millwood, NY


Ryan Torres, CH
Great Neck, NY

Ryan Santelli Torres graduated with an A A S from Farmingdale State University in Ornamental Horticulture. She is a Certified Arborist, Pesticide Applicator and Nursery and Landscape Professional. Ryan currently is the horticulturist for the Town of North Hempstead where she is also the director of Clark Botanic Garden in Albertson NY. Ryan also is an educator at the Bronx Botanic Garden in various topics of insect, disease and weed ID and management. Ryan enjoys educating people in landscape design, maintenance and horticulture topics.

North Carolina

Joseph Moore, CH
Monroe, N.C.

“Becoming a Certified Horticulturist with ASHS is important to me because it validates my skills in the horticulture trade and also shows commitment to my employer."


Douglass Lanning, CH
Glenville, NC

Eva Pratt, CH
Raleigh, NC


David Ardrey, CH
Newark, OH

Heather Bauder, CH
Wooster, OH


Michael Hiatt, CH
Dublin, OH


Brian Kampman, CH
Springfiled, OH

Robert Norris, CH
Harrison, OH

Myra Messick Simons, CH
Miamiville, OH


Richard R. Varga, CH
Avon, OH 


Glin Varco, CH
Portland, OR



Sean Breckin, CH
Elkins Park , PA

Alexandra Dadio, CH
Perkasie, PA

Connor Diggins, CH
Wallingford, PA


Robert Joseph Dreisbach, Jr., CH
4958 Madison Dr.
Brookhaven PA 19015

Robert has a Bachelor of Arts Degree in Art, with a concentration in Graphic Design from Salisbury University 1998.  Currently he is a Foreman and Nursery manager for a landscaping installation company in the Philadelphia metropolitan area.


William Gambone, CH
Birdsboro, PA

Christian Horst, CH
Jenkintown, PA

Abby Jaroslow, CH
Elkins Park , PA

Kimberly Labno, CH
Philadelphia, PA

Monica Pape, CH
Annville, PA

Ryan Sweeney, CH
Longhorne, PA


Terry A. Willoughby, Jr., CH
Danville, PA


South Carolina

Theodore Davis, CH
Travelers Rest, SC



Chloe Barrett, CH
Nashville, TN

Erin Bell, CH
Union City, TN

Peter Duguay, CH
Nashville, TN


Jennifer Ferrari-Bullock, CH
Pegram, Tennessee
Belle Meade Plantation


Guiseppe Baldi, CH
Arlington, TX

Jeremiah Davis, CH
Denison, TX
(214) 924-0948

Jeremiah runs his own tree assessment consultancy – Yggdrasil Consulting – after gaining amenity horticulture experience with the Dallas Arboretum and production arborist experience with the Davey Tree Expert Company. Prior to working outdoors, he was a professional computer programmer for a decade. The transition was a profession / hobby swap after earning an Associate of Applied Science degree in Horticulture from Tarrant County College. In addition to being a CH, he is an International Society of Arboriculture (ISA) Certified Arborist [TX-4114A] and is Tree Risk Assessment Qualified.

Andrew Humphreys, CH
Bryan, TX

Kyle Jordan, CH
Houston, Texas

A graduate of Texas A&M University, Kyle has interests in many different areas of horticulture. Prior to his current position in the landscape department of a home owners/property owners association, he has worked in public gardens, tropical butterfly habitat, a specialty retail nursery and a teaching and research greenhouse. He looks forward to using the Certified Horticulturist program to find ways to reduce the environmental impact of the green industry while employing economically sustainable methods, and re-connecting people with plants in particular and the natural world in general.

Whitney Milberger-Laird, CH
Richmond, TX


Stephen Feagans, CH
Arlington, VA


Mark Griffith, CH
Virginia Beach, VA

Michael (Mark) Hollingsworth, CH
Irvington, VA

Patrick Mulrooney, CH
Warrenton, VA

Laura Shaub, CH
Alexandria, VA

Kimberly Gottbrecht, CH
Charlottesville, VA


Meaghan Rich, CH
Seattle, Washington


West Virginia

Susan Hall, CH
Kearneysville, WV


Terry Hodge, CH
Madison, Wisconsin


Phillip Craig Alderidge, CH
Laramie, WY


Michael R. Baldwin, CH
1416 E. Custer St., A
Laramie, Wy, 82070
(509) 885-0027

Wendy Clements, CH
Laramie, WY


Keith Kershaw
Sheridan, WY


Andy B. Smith, CH
5520 Pilot Peak Road
Laramie, WY 82070




Holly Horne,CH
Toronto, Ontario, Canada
Ginkgo Sustainability

Hong Kong

Hiu Man Cheung, CH
Commonwealth War Graves Commission (Hong Kong)


Poon Fung, CH







1018 Duke Street
Alexandria, VA 22314
Phone: 703.836.4606