Harrell's Bio-MAX®

Foliar Nutrition

Harrell’s Bio-MAX foliar nutritionals represent state of the art “true foliar” technology for providing more effective and efficient nutrition for closely mowed turf.

  • Each product contains multiple sources of nutrients
  • Nutrient sources are high quality—often food or pharmaceutical grade
  • Nutrients are combined in carefully considered ratios

  • Nutrients are chelated and complexed with organic sequestrants
  • Contain seaplant extract
  • Contain fulvic acid and amino acids

Harrell’s Bio-MAX® liquid foliar nutritionals, represent state of the art “true foliar” technology for providing more effective and efficient nutrition for ornamentals and closely mowed turf.

  1. Translocuticular Pore Spaces
    • These cuticle cracks are small, numerous, and always open, providing the perfect entryway for well-engineered and formulated nutrients.
  2. Harrell's MAX®
    • Harrell’s MAX® Foliars are formulated so the molecular structures are small enough to pass through these pore spaces and penetrate into the turfgrass plant.

Benefits of Seaplant Extract

Our ascophyllum nodosum, cold-processed Seaplant Extract contains naturally occurring hormones (cytokinins and auxins) plus 17 naturally occurring plant-based amino acids plus vitamins plus all the major and minor nutrients and trace elements known to be essential for turfgrass health and growth.  Furthermore, Seaplant Extract has been shown by independent research to increase all of the following:

  • Plant physiological fitness
  • Plant photosynthetic capacity
  • Chlorophyll content
  • Plant antioxidant levels
  • Cell wall strength
  • Stress tolerance
  • Disease resistance
  • Drought tolerance
  • Root mass and length

Harrell's Bio-MAX® foliar nutritionals are powered by plant health beneficial ingredients including  Sea Plant Extract, Humic Acid and/or Fulvic Acid formulated to increase stress tolerance, photosynthesis and root development.

Harrell's offers four products formulated in this way—two powerful biostimulants (4-0-0 and Root Enhancer) and two balanced nutrition products (7-7-7 and 12-0-6). These products can be combined in easy tank mix combinations to provide the desired amount of macro and micronutrients for optimum turf health, quality, color, and controlled growth.

The Value of Fulvic Acid

Research at Clemson and VirginiaTechUniversities demonstrated that humic acid can provide an additive biostimulant effect.  Fulvic acid is the portion of humic acid that is soluble over the widest pH range.

The value of Fulvic Acid includes all of the following.  Here's what it can mean to the professional turfgrass manager:

  • Fulvic acid is a powerful organic electrolyte, which helps dissolve minerals and metals, so it transforms minerals to make them more readily available for absorption.
  • Fulvic acids contribute to plant health and physiological fitness by enhancing the availability of nutrients, vitamins, coenzymes, and auxins.
  • Fulvic acids enhance plant metabolism so they can help make turf more stress tolerant and disease resistant.
  • Fulvic acids increase the amount of carbohydrates in the plant.  More carbohydrates means more energy and reserves.

NEW! EarthMAX™ Liquid Organic

Designed to Increase Plant Health, While Minimizing Environmental Impact



  • 100% Organic to USDA standards
  • Contains high levels of humic and fulvic acid
  • Provides all 16 essential elements required for optimal plant health in a readily available organic form
  • Mychorrhizae and Saprotrophic Fungi
  • High carbon content
  • Unique combination of beneficial bacteria and fungi including Bacillus subtilis

Designed for these Benefits

  • Improves C.E.C.- helps hold nutrients in the root zone
  • Chelates nutrients including Ca, Mg and Fe
  • Helps prevent transplant shock
  • Enhances root systems ability to absorb nutrients
  • Rapid seed germination
  • Faster and denser root mass development
  • Increases water-holding capacity
 EarthMAX vs. Non-EarthMAX plants  EarthMAX vs non-EarthMAX plants
Left without EarthMAX™. Right with EarthMAX™. Left without EarthMAX™. Right with EarthMAX™.

EarthMAX™ Tech Specs

EarthMAX™ is used in intensive plant management to help increase root development and stress conditioning.

EarthMAX™ has a concentrated photosynthetic biological package containing, but not limited to:

  • Bacillus amyloliquefaciens: Naturally occurring bacteria that is a growth enhancer through the enzymes it produces.
  • Bacillus megaterium: Used as a soil additive in agriculture and horticulture. Produces a large variation of enzymes and recycles organic matter in soil. Plays a significant role in the carbon and nitrogen cycle and breaks down rock phosphate.
  • Bacillus subtilis: Also known as the grass Bacillus. Naturally found in soil. Reduces nitrate and supports plant growth. Forms biofilms in the root zones. Bacillus subtilis has been identified as inducing plant’s systemic response against disease.
  • •Bacillus licheniformis: Is a saprophytic bacteria that degrades thatch.

Other Bacillus present in EarthMAX™ cycle nutrients and reduce ammonia, nitrites, and nitrates. This process produces cytokinins and a wide variety of enzymes that enhance the natural biological processes in the soil to expedite nutrient transfer to the root zone.

EarthMAX™ also contains ecto-mycorrhizal fungal spores.

EarthMAX™ contains humic and fulvic acid. Unlike all other Leonardite humates, the patented cold-water extraction process of EarthMAX™ ensures that the biology present in the product survives in the production of EarthMAX™ and is stable in a highly concentrated form.

EarthMAX™ comes from one of the highest fixed carbon deposits on earth. The carbon in EarthMAX™ helps the soil hold on to nutrients and moisture. Soil high in carbon stays moist longer after rains and irrigation, has better structure for the growth of roots and exchanges nutrients more efficiently than soil with less carbon.

EarthMAX™’s 16 essential nutrients help provide complete fertilization, complementing standard N, P, K and micronutrient programs.

Related Products

Harrell's Bio Max 4-0-0 2.5 Gal 820440 SDS Label More…

  • Increase resistance to stress
  • Improve photosynthetic efficiency
  • Provide foliar Nitrogen, Iron, and Manganese

Harrell’s Bio-MAX 4-0-0 is a professional-use product offering turf managers advanced foliar nutrition. This product is a proprietary formula containing macroand micronutrients plus seaplant extract. Bio-MAX 4-0-0 provides two proven biostimulants to increase turfgrass stress tolerance and root development, and it provides both Iron and Manganese for improved color.


  • Total Nitrogen (N) 4.00%
    2.25% Nitrate Nitrogen
    1.75% Urea Nitrogen*
  • Iron (Fe) 2.00%
    2.00% Chelated Iron (Fe)
  • Manganese (Mn) 3.00%
    3.00% Water Soluble Manganese (Mn)

Derived from: Urea, Iron Citrate, and Manganese Nitrate.

Also contains non-plant food ingredients: Fulvic Acid and Seaplant Extract (Ascophyllum nodosum).

*1.75% Urea Nitrogen stabilized with dicyandiamide and N-(n-butyl) thiophosphoric triamide.

Harrell's Bio Max 12-0-6 w/UMAXX 2.5 Gal 820442 SDS Label More…
Harrell's Bio Max 12-0-6 w/UMAXX is designed to increase resistance to stress and is formulated to improve photosynthetic efficiency, provides foliar uptake of nitrogen, potassium and micronutrients, and is formulated with 100% urea nitrogen.
Harrell's Bio Max SWE 30 Gal TX, CT, KY, AR, NC, SC, TN, GA, VA, LA, MS & AL Only 820445 SDS Label More…
Applications of seaplant extract derived from Ascophyllum nodosum have demonstrated consistent improvements in overall plant health. The combination of cytokinins, auxins, and amino acids contained within seaplant extract all contribute to increased stress resistance and improved plant function. The inclusion of fulvic acid with seaplant extract further enhances the plant health effects greater than either of the two applied individually. Overall, the combination of seaplant extact, derived from Ascophyllum nodosum, and fulvic acid can improve plant performance and increase stress tolerance. Currently available in TX, CT, KY, AR, NC, SC, TN, GA, VA, LA, MS & AL.
Harrell's Bio Max 7-7-7 2.5 Gal 820487 SDS Label More…

  • Increase resistance to stress
  • Improve photosynthetic efficiency
  • Provide foliar Nitrogen, Phosphorus, Potassium and micros

Powered by seaplant extract and fulvic acid, this balanced biostimulant provides stress tolerance and root development in a balanced NPK formulation with micronutrients. GUARANTEED ANALYSIS

  • Total Nitrogen (N) 7.00%
    1.0% Nitrate Nitrogen
    6.0% Urea Nitrogen*
  • Available Phosphate (P2O5) 7.00%
  • Soluble Potash (K2O) 7.00%
  • Iron (Fe) 1.00%
    1.00% Chelated Iron (Fe)
  • Manganese (Mn) 0.08%
    0.08% Water Soluble Manganese (Mn)
  • Zinc (Zn) 0.08%
    0.08 Water Soluble Zinc (Zn)

Derived from: Urea, Phosphoric Acid, Potassium Phosphate, Iron Citrate, Manganese Citrate, Manganese Nitrate, Magnesium Nitrate, Magnesium Citrate, and Zinc Citrate.

Also contains non-plant food ingredients: Fulvic Acid and Seaplant Extract (Ascophyllum nodosum).


*3.00% Urea Nitrogen stabilized with dicyandiamide and N-(n-butyl) thiophosphoric triamide.

Harrell's EarthMAX/HuMax 2.5 Gal 880062 SDS Label More…

  • Improve nutrient cycling
  • Increase micronutrient availability
  • Increase resistance to stress

Harrell’s Bio-MAX® EarthMAX® is intended for use on trees, shrubs, grass, vegetables, flowers, and crops. Applying EarthMAX® to indoor and outdoor container plants may aid in micronutrient uptake and increase water retention. Provides trace minerals, soil biology and humic acids. When used as directed, EarthMAX® is non-toxic and safe to use around people.

Derived from: Compost Extract.

Also contains non-plant food ingredients: Humic Acid.

Harrell's Bio Max Root Enhancer 2.5 Gal NO CA ROOMAX SDS Label More…

  • Increase resistance to stress
  • Improve photochemical efficiency
  • Provide foliar Iron

Harrell’s Bio-MAX® Root Enhancer is a specially formulated blend of naturally occurring organic compounds and chelated Iron (Fe) designed for both foliar and soil applications. When used at the recommended rates Root Enhancer will improve uptake and translocation of Iron (Fe) within the plant. When used as a soil drench Root Enhancer can stimulate the activity of desirable microorganisms, such as mycorrhizae and symbiotic bacteria. Multiple applications have been shown to stimulate plant growth, especially during periods of environmental stress.


  • Iron (Fe) 5.00%
    5.00% Chelated Iron (Fe)

Derived from: Iron Glucoheptonate.

Also contains the following components: Fulvic Acid derived from Leonardite shale and Seaplant Extract (Ascophyllum nodosum).