MustGrow Reports Significant U.S. Potato Yield and Economic Performance in Large Scale Field Trials Utilizing TerraSanteᵀᴹ

11 December 2025, Canada: MustGrow Biologics Corp. (TSXV:MGRO) (OTC:MGROF) (FRA:0C0) (the “Company” or “MustGrow“), a leading provider of biological and regenerative agriculture solutions, is pleased to announce outstanding performance metrics on its organic TerraSante^TM biofertility product applied to potato farming acres in Washington State and Idaho, based on customer performance data.

In its use by a Washington State farming customer, TerraSante^TM demonstrated a consistent and substantial potato yield, size, and quality increase at a dose rate of 11 lbs/acre.  This customer performance data was generated on a large-scale commercial potato field.  With the increase in size, quality and yield, the farmer estimated an approximate US$5,000 increase in value per acre at a cost of only US$180 per acre for TerraSante^TM.  Work done in fields in Idaho has also shown significant benefits to the soil and health of the potato crops when used within a currently established grower production program.

These large-scale field trial results are consistent with small plot results that MustGrow has completed in the U.S. with TerraSante^TM, as outlined in the following table:

The following figures illustrate TerraSante^TM ‘wet-able’ powder being mixed into liquid format and applied through typical spray equipment.

MustGrow’s mustard-derived TerraSante^TM organic biofertilizer is a soluble mixable form containing nutritious plant proteins and carbohydrates that feed the soil and soil microbes.  TerraSante^TM is currently registered and approved for sale in California, Florida, Arizona, Idaho, Oregon, and Washington State, under Organic OMRI Listed® certification and California’s Organic Input Material (OIM) Program.

In 2024, the United States Department of Agriculture (USDA) reported 927,000 potato acres harvested for US$4.6 billion of value sold.⁽¹⁾

TerraSante^TM for Soil and Ecological Health

MustGrow’s biofertility program focuses on soil and soil microbiome health, nutrient and water use efficiencies, and plant yields.  Soil is a farmer’s most valuable asset, and MustGrow’s mustard plant-based technologies are being applied with the intention to improve not only the health of the soil, but also the surrounding ecological environment.

TerraSante^TM, an organic biofertilizer in soluble mixable form, contains nutritious plant proteins and carbohydrates that feed the soil and soil microbes, potentially improving beneficial microbial activity and ensuring long-term sustainable soil health.  These targeted micro-communities have been shown to work to improve nutrient availability, which can potentially increase plant vigor and yields, while reducing plant stress.  TerraSante^TM has the potential to improve crop nutrient uptake and, hence, overall crop performance.  There are no artificial additives or preservatives used during its manufacturing.

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