Imagine being able to control the height and growth of your plants with precision, ensuring they’re not just healthy but also perfectly suited for retail—all without the hassle of constant pruning. Sounds too good to be true? Well, it’s not. Ethephon substrate drenches are revolutionizing the way growers manage plant growth, and the results are nothing short of game-changing. But here’s where it gets even more intriguing: this method isn’t just about aesthetics; it’s about sustainability, profitability, and efficiency in horticulture.
Controlling Stem Elongation in Perennials
A groundbreaking study explored how ethephon substrate drenches can regulate stem elongation in containerized herbaceous perennials. The findings? Targeted applications not only keep plant height in check but also maintain overall plant health. This means growers can produce uniform, high-quality plants that meet the demands of retail markets. Think of it as giving plants a tailored growth plan—no more lanky stems or uneven growth.
Growth Management in Annual Bedding Plants
And this is the part most people miss: the same technique works wonders for annual bedding plants. Another study revealed that controlled ethephon applications can curb excessive growth, resulting in compact, visually appealing plants. For growers, this translates to cost-effective and efficient strategies for greenhouse and nursery production. It’s like having a secret weapon to ensure every plant looks its best.
Industry Implications: A Win-Win for Growers and the Environment
Let’s face it—in ornamental horticulture, height and growth control are non-negotiable. They impact not just the plant’s appearance but also the operational efficiency of production. This research provides actionable insights to help growers achieve uniformity, reduce labor-intensive tasks like pruning, and enhance crop marketability. But here’s the controversial part: Can we truly balance commercial demands with sustainable practices? This research suggests we can, but what do you think?
Behind the Research
This innovative work was spearheaded by W. Tyler Rich, a research associate at The Ohio State University, as part of his Master of Science degree in Horticulture and Crop Science. The goal? To support the label expansion of Collate® 2L (ethephon), which, as of May 2025, is the only ethephon product EPA-approved for both substrate drench and foliar spray use. These findings not only guide growers on application timing but also emphasize responsible use in floriculture production.
W. Garrett Owen, an extension Specialist and Assistant Professor of Sustainable Greenhouse Nursery Systems, plays a key role in this field. His initiatives focus on floriculture crop production, plant nutrition, growth regulation, and crop diagnostics—areas critical to modern horticulture.
Dive Deeper into the Science
For the full story, check out the ASHS HortScience electronic journal at https://doi.org/10.21273/HORTSCI18418-24 and https://doi.org/10.21273/HORTSCI18579-25.
About ASHS: Leading the Way in Horticulture
Founded in 1903, the American Society for Horticultural Science (ASHS) is a global leader in promoting scientific research and education in horticulture. With thousands of members worldwide—scientists, educators, students, and industry professionals—ASHS tackles everything from plant breeding to marketing. Their mission? To advance horticulture in all its forms. Learn more at ashs.org.
Final Thoughts
Ethephon drenches are more than just a growth control method—they’re a step toward smarter, more sustainable horticulture. But as we embrace these innovations, let’s ask ourselves: How can we ensure these practices benefit both growers and the planet? Share your thoughts in the comments—let’s spark a conversation!
