Biological Fertilizer Enhancer for Dry and Liquid Applications
IgniteS4®: Better Uptake. Better Crops.
IgniteS4® is AgriGro’s biological fertilizer enhancer designed to be applied directly to both dry and liquid N P K fertility programs. Whether it is impregnated on granular fertilizer or injected into liquid blends, IgniteS4® upgrades standard fertilizer into a higher efficiency biological tool by improving nutrient availability, supporting soil function, and driving stronger crop performance across a wide range of cropping systems.
IgniteS4® is positioned for growers and retailers who want more from every pound or gallon of fertilizer. Instead of simply applying more inputs, IgniteS4® helps the crop capture and utilize more of what is already being applied, improving the return on fertilizer investment and supporting healthier, more resilient crop development.
Improved Fertilizer Efficiency
Enhances nutrient availability and uptake from dry and liquid fertilizer applications
Reduced Nutrient Tie-Up
Helps prevent nutrients from becoming bound in the soil, keeping them plant-available
Supports Native Soil Biology
Stimulates beneficial microbial activity around applied fertilizers
Enhanced Root-Zone Performance
Creates a more biologically active environment where fertilizer meets the root system
More Consistent Nutrient Release
Promotes a steadier, more uniform nutrient availability over time
Improved Return on Fertilizer Investment
Helps maximize the effectiveness of applied nutrients without increasing fertilizer rates
How It Works: Activates Soil Biology at the Fertilizer, Root, and Soil Interface
When IgniteS4® is innoculated onto dry fertilizer or blended into liquid fertilizer, its biological compounds coat or disperse throughout the fertilizer matrix. As that fertilizer is applied and placed into the soil, IgniteS4® moves with the nutrient band or granule zone, concentrating its activity exactly where nutrient release and uptake are supposed to happen. This is important because the fertilizer zone is also where nutrient tie up, fixation, and loss can occur.
Once in the soil, IgniteS4® stimulates native microbial populations and increases enzymatic activity around the fertilizer placement area and emerging roots. This biological response helps convert tied up forms of nutrition into plant available forms, supporting more efficient nutrient release and uptake over time. In practical terms, IgniteS4® helps the crop access more of the nutrients already being applied by improving the biological environment surrounding the fertilizer, the soil, and the root interface.
By pairing IgniteS4® with your existing N P K program, you are not just adding another input, you are upgrading how your fertilizer performs in the soil, improving nutrient efficiency, promoting stronger root development, and supporting more consistent crop performance.
Nutrient Uptake Boost
More Above-Ground Growth
Application Methods and Recommended Rates
Dry fertilizer impregnation
The IgniteS4® application process must be performed by a commercial fertilizer retailer properly equipped for fertilizer impregnation.
Dry Fertilizer Impregnation
- IgniteS4® must be done by a commercial fertilizer retailer.
- Use 96 oz per ton when applying under 250 lbs of fertilizer per acre.
- 64 oz per ton for 250–400 lbs
- 32 oz per ton for over 400 lbs.
Liquid Fertilizer Injection
- For liquid fertilizer injection, add IgniteS4® to the fertilizer to achieve at least 8 oz/acre (236 ml/acre), blending thoroughly before application
Get Started Today
Contact AgriGro to learn how Ultra® can enhance your operation.