August 16, 2022

Dümmen Orange Completes Its North American Product Management Team and Announces New Roles

COLUMBUS, Ohio (Aug. 3, 2022) – Dümmen Orange, the world’s largest breeder and propagator of cut flowers, bulbs, tropical plants, pot plants, bedding plants and perennials, has named a new department leader, added new personnel, and repositioned team members to redesign its annuals, perennials, and potted plants (APP) product management team in North America.

“Having such a talented mix of dedicated professionals with floriculture experience, extensive product knowledge and passion for progress is vital to any company’s success and we are thrilled by all the wonderful additions to our team,” said Nathan Sell, managing director of annuals, perennials, and potted plantsAPP for Dümmen Orange North America. “We are excited to have our North American product management team at full strength.” 

Rebecca Siemonsma has been promoted to the head of product management for Dümmen Orange in North America. Based in South Dakota, she is responsible for the coordination of product development and go-to-market strategy in collaboration with the North American product management team. All Dümmen Orange regional product managers in North America will report to her and she retains her regional product manager duties in poinsettias and pelargonium 

Rebecca’s horticulture expertise is the result more than 25 years’ experience in the floriculture industry in varied roles: First as a grower of potted flowering crops, and later in technical services and sales prior to joining Dümmen Orange one year ago.  She earned a Bachelor of Science degree in horticulture from South Dakota State University. She also serves as the treasurer for All American Selections. 

Leslie Bayas is a regional product manager for flowering tropicals and heat-loving annuals. As Miami native based in South Florida, Bayas worked as a research and development grower and trial garden manager prior to joining Dümmen Orange last year. She earned her Bachelor of Science degree in biological sciences from Florida International University. 

Sarah Brackman is a regional product manager for potted crops. Having 25 years of experience, she is a leader in product innovation, portfolio management and successful product launches. Prior to joining Dümmen Orange earlier this year, she was a technical sales representative and served as greenhouse manager, grower, and propagator for various greenhouse operations in the Pacific Northwest. Brackman earned her Bachelor of Science in horticulture from Michigan State University. She also serves as a board member for the International Plant Propagator Society in Washington state. 

QuiXia Chen is the national trial manager and regional product manager for garden mums. She joined the company in 2017 after being a research leader and lab manager for garden industry brands in Ohio, Michigan, and South Carolina for nearly a decade. Now based in Ohio, Chen earned a Master of Science degree in plant breeding, genetics and biotechnology from Michigan State University, a Bachelor of Science degree in horticultural therapy and a Bachelor of Arts degree in Spanish from Kansas State University.    

Arnetia Jackson, who recently joined the team, is responsible for specialty annuals as a regional product manager. With a lifelong connection to the industry, she has more than 25 years of experience in growing, sales, production, and operations management. Jackson earned a Bachelor of Arts degree in business administration and computer science from Parks College. Her deep horticultural background and training translates well into product management and will allow her to quickly adapt to the Dümmen Orange product lineup and the company’s North American team.

Zoltan Kovacs is a regional product manager for perennials.  He arrived in the U.S. as an exchange student in 1995 through the University of Minnesota where he majored in horticulture after earning a chemical engineering degree in Hungary. His professional experience includes being a greenhouse manager, perennial program manager, winning numerous trade industry awards from the prestigious Boston Flower Show and being named the 2008 Grower of the Year by Grower Talks Magazine. He also served as head grower and vice president of operations prior to joining Dümmen Orange in 2013, where he started the perennial breeding program from its very beginning and has since introduced over 150 commercial varieties. 

Heather VonAllmen leads the Welcome to the Jungle program as product manager for foliage and succulents. Based in California, her background in sales, marketing, purchasing, and account management gives her a strong vision for developing new products. She led procurement efforts at Armstrong Growers prior to joining Dümmen Orange in 2020. Known around the industry for her passion with succulents and tropicals, VonAllmen has enjoyed significant success during her tenure at Dümmen Orange.

Stephanie Whitehouse is a regional product manager for decorative annuals. She joined Dümmen Orange last year after gaining valuable horticulture experience as a retail general manager and as a sales and marketing manager. Prior to that, she was a graduate residential fellow at Cornell University as well as a field research assistant in its horticultural department, teaching assistant in the plant biology department, and a horticultural intern. Whitehouse earned a Master of Science degree in weed ecology from Cornell University and Bachelor of Science degree in plant sciences from Cornell University.