NACHURS Humi-flex® Max is a highly concentrated liquid humic acid product developed to improve soil performance, support stronger crop development, and increase the efficiency of existing fertility programs.
Formulated through an advanced extraction and refining process, Humi-flex Max contains 12% humic acid derived from leonardite. Its concentrated 1-0-2 formulation supplies nitrogen and soluble potassium from ammonium humate and potassium humate.
NACHURS Humi-flex Max is designed to create a biostimulant effect within the root zone. When incorporated into an in-furrow fertility program, it helps stimulate root growth, improve germination and emergence, and support greater nutrient and water uptake. It can also improve soil characteristics within the rhizosphere, helping establish a more favorable environment for vigorous crop development.
Unlike conventional humic acid suspensions, Humi-flex Max is formulated as a clean, translucent liquid that does not settle during storage. It can be applied through drip and microsprinkler irrigation systems without concern about the product settling and blocking application equipment.
Humi-flex Max offers flexible compatibility with starter fertilizers, pop-up fertilizers, UAN, ATS, KTS, Bio-K® products, micronutrients, polyphosphate fertilizers, low-salt starters, and high-pH fertilizer solutions when proper mixing procedures are followed.
Guaranteed Analysis
- Total Nitrogen: 1%
- Available Phosphate: 0%
- Soluble Potash: 2%
- Humic Acid Derived from Leonardite: 12%
Ideal Applications
- In-furrow starter fertilizer programs
- Pop-up fertilizer applications
- 2×2 and other banded applications
- Corn starter programs
- UAN sidedress applications
- Soil-applied fertilizer programs
- Foliar treatments
- Open irrigation systems
- Closed fertigation systems
- Drip irrigation
- Microsprinkler irrigation
- Liquid fertilizer blends
- Bio-K fertilizer programs
- Micronutrient applications
- Standalone soil treatments
- Fields requiring improved water-holding capacity
- Soil-management programs focused on root-zone activity
Soil-Applied Rate
Apply 1 quart to 5 gallons or more per acre with fertilizer or water through in-furrow, 2×2, or another suitable soil-placement method.
Higher rates or repeated applications may be beneficial depending on soil conditions, crop requirements, and professional recommendations. Agitation is required when Humi-flex Max is mixed with concentrated phosphate fertilizers such as 10-34-0.
General Foliar Rate
Apply 1–3 quarts per acre with enough water to provide thorough and uniform coverage.
Humi-flex Max may be applied using ground or aerial equipment. Because the product is a weak alkaline salt, a suitable buffer may be required. Test unfamiliar combinations on a small scale before broad application.
Fertigation Rate
Apply 1–5 gallons or more per acre through open irrigation systems or inject the product into closed irrigation systems.
Humi-flex Max may be applied alone or with a compatible liquid fertilizer. The final rate should be based on crop requirements, soil conditions, irrigation method, and professional fertility recommendations.
Blending and Compatibility
NACHURS Humi-flex Max can be splash blended and is compatible with many common fertilizer products, including:
- Bio-K potassium products
- UAN solutions
- Ammonium thiosulfate
- Potassium thiosulfate
- Micronutrients
- Polyphosphate fertilizers
- Low-salt starter fertilizers
- High-pH fertilizer solutions
For best mixing results, add products to the tank in this order:
- Water
- NACHURS Humi-flex Max
- Fertilizer
Some concentrated phosphate fertilizers, including 10-34-0, may require Humi-flex Max to be diluted with an equal volume of water or another compatible fertilizer before blending. Always perform a proportional jar test before field mixing.
Reported Field Performance
According to NACHURS, replicated third-party trials reported:
- An 87% in-furrow win rate on corn across 30 trial locations
- A 14-bushel-per-acre increase when Humi-flex Max was applied with UAN as a sidedress treatment
Field performance can vary with crop, soil, weather, fertility program, placement, timing, and application rate.
Why Growers Choose NACHURS Humi-flex Max
Healthy crop development begins with an active and productive root zone. Compacted soil structure, limited nutrient availability, low water-holding capacity, and reduced biological activity can prevent crops from using applied nutrition efficiently.
NACHURS Humi-flex Max supplies a concentrated source of humic acid designed to support soil structure, root growth, microbial activity, nutrient availability, and water management. Its clean liquid formulation and broad application flexibility allow it to fit into starter, pop-up, sidedress, foliar, and irrigation programs throughout the crop’s growth cycle.
Humi-flex Max should supplement a complete soil fertility program. Always follow label directions and consult an authorized NACHURS distributor or agronomist for crop- and field-specific recommendations.
Build a stronger root zone. Improve nutrient efficiency. Maximize every acre with humic performance. 
