Key benefits of Vertex-ST Dry

Two-year shelf life — convenient and long-lasting for easy storage and flexibility.
Phosphorus availability — makes phosphorus available to the plant.
Nitrogen fixation — stabilized Azospirillum bacteria naturally fix atmospheric nitrogen, reducing the need for synthetic fertilizers.
Improved root growth — promotes stronger root systems to support nutrient uptake and stress resilience.
Increased yield — leverages the synergy of two trusted TerraMax products for maximum return on investment.

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Vertex-ST Dry corn inoculant, 5 pound jug

Proven results in the field

Multi-state trial data comparing untreated (UTC) to Vertex-ST Dry

Beatrice, NE

253.2

255.5

+2.3 bu/ac

Watertown, SD

171.1

176.4

+5.3 bu/ac

Jackson, MN

243.1

249.1

+6.0 bu/ac

Glencoe, MN2025

201.9

225.7

+23.8 bu/ac

Partner: New Ventures

Delphos, OH2024

224.9

238.5

+13.6 bu/ac

Partner: TSI

UTC (untreated) Vertex-ST Dry

Vertex-ST Dry is a TerraMax biological seed treatment inoculant for corn. It combines Azospirillum brasilense, a nitrogen-fixing bacterium, with the phosphorus-solubilizing bacteria Pseudomonas fluorescens and Pantoea eucalypti. It's applied as a dry seed treatment at 2 oz. per bag of seed (80,000 kernels).

Vertex-ST Dry showed gains of 2.3 to 23.8 bushels per acre over the untreated check in trials across Nebraska, Minnesota, Ohio, and South Dakota.

Trial-by-trial results

Vertex-ST Dry vs. untreated check, corn

Nebraska, South Dakota, Minnesota, and Ohio

Vertex-ST Dry yielded more than the untreated check at all 5 sites.

Beatrice, Nebraska: Vertex-ST Dry yielded 255.5 bu/acre vs. 253.2 bu/acre for the untreated check, a difference of +2.3 bu/acre.
Watertown, South Dakota: Vertex-ST Dry yielded 176.4 bu/acre vs. 171.1 bu/acre for the untreated check, a difference of +5.3 bu/acre.
Jackson, Minnesota: Vertex-ST Dry yielded 249.1 bu/acre vs. 243.1 bu/acre for the untreated check, a difference of +6.0 bu/acre.
Glencoe, Minnesota, 2025 (trial partner: New Ventures): Vertex-ST Dry yielded 225.7 bu/acre vs. 201.9 bu/acre for the untreated check, a difference of +23.8 bu/acre.
Delphos, Ohio, 2024 (trial partner: TSI): Vertex-ST Dry yielded 238.5 bu/acre vs. 224.9 bu/acre for the untreated check, a difference of +13.6 bu/acre.