As biostimulants continue to gain traction across the agricultural industry, ensuring credibility and consistency has become essential. That’s where The Fertilizer Institute’s (TFI) Certified Biostimulant program comes in. Launched in June 2023, the program provides third-party verification of biostimulant products to uphold industry standards in efficacy, safety, composition, and truthful marketing claims.

“Biostimulant products have been shown to promote nutrient uptake, stress tolerance, and overall plant health and vigor,” said Corey Rosenbusch, President and CEO of TFI. “The Certified Biostimulant Program was established to provide a standard for these products and ensure growers and retailers will be able to confidently select the right solutions to fit their programs.”

Certification also underscores the connection between sustainable agriculture and nutrient management, helping growers minimize nutrient loss and maximize performance.

“Biostimulants support environmental stewardship by improving the efficiencies of fertilizer application and soil health while also increasing crop yields,” Rosenbusch added. “We are proud to bring consumer confidence to the marketplace.”

In March 2024, AgroLiquid’s PrimAgro C-Tech became the first product to receive certification. Since then, seven additional biostimulants from leading ag companies have been approved. Below is a summary of all eight TFI-certified products that ag retailers should know about today.

PrimAgro C-Tech

Company: AgroLiquid
Awarded: March 2024
Label: View Label

Purpose: PrimAgro C-Tech combines organic acids and live Bacillus species to optimize nutrient uptake and minimize nutrient leaching. Ideal for moisture-challenged soils, the product targets nutrient retention and root-zone biological activity.

“The product is ideal for use in soil types that don’t retain moisture very well,” said Nick Bancroft, President/CEO of AgroLiquid. “It’s great to have this certification as proof of what C-Tech can do for customers.”

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PSP 5-0-0

Company: Hello Nature USA
Awarded: April 2024
Label: View Label

Purpose: PSP 5-0-0 enhances Nitrogen Use Efficiency and improves yield and quality in woody perennials, vegetables, broadacre crops, and ornamentals.

“There is an increasing number of biostimulant products on the market…Having the certification label from TFI provides both the retailer and end-user with the assurance that we’ve gone the extra mile,” said Hello Nature CEO Luca Bonini.

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Environoc 401

Company: Biodyne
Awarded: August 2024
Label: View Label

Purpose: Environoc 401 is a microbial consortium designed to optimize nutrient use and improve the productivity of broadacre and vegetable crops through biologically enhanced soil activity.

“Receiving the Certified Biostimulant label from TFI is a testament to our commitment to excellence,” said Gilman Farley, owner of Biodyne USA.

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DUO MAXX

Company: Timac Agro
Awarded: August 2024
Label: View Label

Purpose: DUO MAXX is a fertilizer additive formulated to prevent nutrient loss from leaching, run-off, and volatilization—supporting fertilizer efficiency and yield stability.

“We are extremely proud to be the first fertilizer additive to have received the Certified Biostimulant label from TFI,” said Jake Tanis, CEO of Timac Agro USA.

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Transit 500

Company: Valent BioSciences
Awarded: August 2024
Label: View Label

Purpose: Transit 500 aids plants in stress recovery, enhances Brix levels, and boosts root and shoot growth through improved nutrient uptake and fertilizer efficiency.

“Customers can be confident their biostimulant choices have been well researched and held to the highest industry standards,” said Maria Herrero, Senior Director of Regulatory Affairs, Valent BioSciences.

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BioliNE Gold

Company: BioliNE Corp.
Awarded: October 2024
Label: View Label

Purpose: A concentrated fulvic acid solution, BioliNE Gold is recommended across fertility programs to increase yield, vigor, and soil biological activity.

“With the biostimulant product market growing, having this certification label provides both the retailer and grower the confidence that our products adhere to the U.S. Biostimulant Industry Guidelines,” said Ray McDonald, Founder & President of BioliNE.

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Algamin AQO

Company: Brandon Bioscience
Awarded: April 2025

Purpose: Algamin AQO is a seaweed-derived liquid biostimulant based on Ascophyllum nodosum extract, designed to promote plant health and stress resilience through natural bioactive compounds.

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Primacy ALPHA

Company: Verdesian Life Sciences
Awarded: May 2025
Label: View Label

Purpose: Primacy ALPHA is a phosphite-free nitrogen management biostimulant designed to support nutrient uptake, reproductive growth, and resilience under stress across a broad range of crops.

“This certification is a powerful endorsement of the science behind Primacy ALPHA,” said Amber Harrison, Product Marketing Manager at Verdesian. “It reflects our commitment to proven, sustainable technologies that help crops thrive —especially under stress.”

Why Certification Matters More Than Ever

With an expanding catalog of biostimulants on the market, TFI’s Certified Biostimulant label is quickly becoming a trusted benchmark for quality and efficacy in ag retail. Each of the eight certified products not only meets the program’s rigorous criteria, but also offers targeted agronomic benefits that can help drive sustainable outcomes.

As Rosenbusch emphasized: “We look forward to certifying more biostimulant products in the future that help to ensure our dinner tables are full and the environment is being protected.”