Key Takeaways:
- Redox Bio-Nutrients' Mainstay® Si has received certification from The Fertilizer Institute (TFI).
- Redox Bio-Nutrients is the first company with two TFI-certified biostimulant products.
- The certification validates efficacy, safety, and product composition.
- Mainstay® Si combines calcium and silicon to support crop quality and stress tolerance.
- The milestone reinforces Redox’s focus on quality and grower confidence.
Redox Bio-Nutrients Secures TFI Certification for Mainstay® Si
Redox Bio-Nutrients, LLC has announced that its biostimulant product Mainstay® Si has received certification from The Fertilizer Institute (TFI). The certification indicates that the product meets industry-recognized standards for efficacy, safety, and composition under TFI’s Biostimulant Certification Program.
With this latest certification, Mainstay® Si joins Mainstay® Calcium 2.0, making Redox Bio-Nutrients the first company to achieve TFI certification for two biostimulant products. According to the company, this represents a significant milestone in a market where third-party validation of biostimulants remains limited.
“These certifications further validate our all-in commitment to providing growers with technology that consistently delivers positive results,” said Colton Moon, President of Redox Bio-Nutrients.

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