Harrell's MAX®

About Harrell's MAX

Harrell's MAX® offers you results that get noticed.

HarellThe complete line of Harrell’s MAX® liquid foliar nutritional products, including Harrell's Bio-MAX®, is an ideal way to supplement your granular fertilization program. Liquid foliar fertilizers “feed” through both the leaves and roots, allowing for maximum plant uptake, less environmental loss and faster green-up. The products may also be mixed with many pesticides and plant growth regulators for a labor-saving, one-stop application.

The Harrell’s MAX® product line has been specifically formulated to provide you with a complete and highly effective fertilizer portfolio. All liquid foliar nutritional N, P & K components are derived from the finest foliar grade sources, allowing for optimum uptake and exceptional product quality. In addition, all Harrell’s MAX® micronutrient components have been chelated in order to maximize foliar absorption and protect these essential elements from environmental degradation.


Introducing Harrell's MAX® liquid foliar nutritional products, including Harrell's Bio-MAX®. Harrell's MAX is an ideal way to supplement your granular fertilization program, and has been specifically formulated to provide you with a complete and highly effective fertilizer portfolio.

Related Products

Harrell's Max Manganese 5%, 2.5 Gal 200225 SDS Label More…

  • Specifically formulated for optimum Manganese foliar uptake
  • Corrects and prevents Manganese deficiencies
  • Optimizes photosynthetic reactions

Harrell’s MAX® Manganese is a liquid foliar formulation designed to correct and prevent Manganese deficiencies on turf and ornamentals. A jar test to check the compatibilities of new or unfamiliar combinations should be performed prior to mixing and application. The addition of a nonionic surfactant will aid surface coverage which will help leaf absorption. GUARANTEED ANALYSIS
  • Manganese (Mn) 5.00% 5.00% Chelated Manganese
Derived from: Manganese Glucoheptonate
Harrell's Max Magnesium 4%, 2.5 Gal 200231 SDS Label More…

  • Highly effective liquid formulation designed to correct and prevent Magnesium deficiencies
  • Essential component of the chlorophyll molecule
  • Reduces premature leaf abscission

Harrell’s MAX® Magnesium is a liquid formulation designed to correct and prevent Magnesium deficiencies. Magnesium is an important secondary nutrient, very essential for photosynthesis, since it is part of the chlorophyll molecule. Insufficient amounts of Magnesium will appear as a loss of green color at the bottoms of older leaves. Severe deficiencies will also affect younger leaves and can result in the formation of lesions. High levels of Calcium and Potassium can reduce Magnesium uptake. Magnesium assists in chlorophyll production, providing Magnesium in a form that is readily available from both soil and foliar applications. It is ideal for mixing with acid sensitive products and is generally not affected by soil conditions, other nutrients or technical grade materials. GUARANTEED ANALYSIS
  • Magnesium (Mg) 4.00% 4.00% Chelated Magnesium
Derived from: Magnesium Glucoheptonate
Harrell's Stress Relefe, 0-0-25 2.5 Gal 200232 SDS Label More…

  • Specifically formulated for rapid foliar uptake and utilization of Potassium
  • Increases plant strength and tolerance associated with environmental stressors
  • Reduces mottling and marginal chlorosis of leaf tissue

Harrell’s MAX® Stress Relefe is a high solubility, low salt index, liquid Potassium fertilizer which can be applied directly to the soil, to the plant tissues (with water) or through the irrigation system. Stress Relefe provides rapid uptake and utilization of Potassium during the plant’s critical growth stages such as germination and elongation. Stress Relefe can be applied throughout the growing season to correct Potassium deficiencies quickly. A fall foliar Potash application is essential in improving plant stress tolerance from adverse environmental conditions Turf vigor normally responds within a few days of application. Stress Relefe contains no chloride which can corrode equipment and damage turf and soil. GUARANTEED ANALYSIS
  • Soluble Potash (K2O) 25.00%
Derived from: Potassium Acetate
Harrell's Max Minors, 2.5 Gal 200233 SDS Label More…

  • Optimal liquid foliar formulation of essential plant nutrients
  • Aids in the prevention and correction of micronutrient deficiencies

Harrell’s MAX® Minors, a complete minors package, is a liquid foliar formulation of essential nutrients and micronutrients to aid in the prevention and correction of deficiencies. GUARANTEED ANALYSIS
  • Magnesium (Mg) 1.00%
    1.00% Soluble Magnesium
  • Sulfur (S) 3.50%
    3.50% Combined Sulfur
  • Iron (Fe) 4.00%
    4.00% Chelated Iron
  • Zinc (Zn) 0.60%
    0.60% Chelated Zinc
  • Manganese (Mn) 1.00%
    1.00% Chelated Manganese
  • Boron (B) 0.02%
  • Copper (Cu) 0.25%
    0.25% Chelated Copper
  • Molybdenum (Mo) 0.0005%
Derived from: Magnesium Sulfate, Sodium Borate, Copper Glucoheptonate, Iron Glucoheptonate, Manganese Glucoheptonate, Zinc Glucoheptonate, and Sodium Molybdate.
Harrell's Max Potassium + CA 4-0-8 2.5 Gal 200236 SDS Label Metal More…

  • Specifically formulated for optimal Potassium and Calcium foliar uptake
  • Promotes healthy cell wall formation and regulation of the osmotic potential of plant cells

Harrell’s MAX® Potassium plus Calcium is a specially formulated blend of naturally occurring organic compounds designed for application on a wide variety of turf grasses, trees and ornamental plants. When used at the recommended rates, Potassium Plus Calcium will aid in cell wall formation and act as a catalyst in amino acid and protein synthesis. Multiple applications can provide improved tolerance to drought and resistance to environmental stress. GUARANTEED ANALYSIS
  • Nitrogen (N) 4.00%
    4.00% Nitrate Nitrogen
  • Soluble Potassium (K2O) 8.00%
  • Calcium (Ca) 2.15%
Derived from: Potassium Nitrate, Calcium Nitrate Also contains the following components: Fulvic acid derived from Leonardite shale
Harrell's Max Calcium 8.25%, 2.5 Gal 200238 SDS Label More…

  • Specifically formulated to aid in the prevention and correction of Calcium deficiencies
  • Essential for plant cell wall formation and healthy cell division
  • Vital messenger and regulator for numerous plant metabolic processes

Harrell’s MAX® Calcium is a chelated secondary plant nutrient that will aid in supplementing the crop’s Calcium requirement throughout the growing season. When used a in a balanced fertility program, it will correct and prevent Calcium deficiencies. It is not designed to correct soil pH. GUARANTEED ANALYSIS
  • Calcium (Ca) 8.25%
    8.25% Chelated Calcium (Ca)
Derived from: Calcium Glucoheptonate
Harrell's Max Salt Rx 2.5 gal 200245 SDS Label More…

  • Reduces negative effects of Sodium
  • A remedy for bicarbonate affected soils

Harrell’s MAX® Salt Rx has been specially formulated to aid in the prevention and remediation of salt and bicarbonate affected soils. This unique dual mode of action formula will remove salt and bicarbonates through chemical reactions and improve soil structure by enhancing microflora through increased biological activity. GUARANTEED ANALYSIS
  • 0-0-5
  • Soluble Potash (K20) 5.00%
Derived from: Potassium Citrate.
Harrell's Max Long Iron 2.5 Gal 15-0-0 6%Fe 200249 SDS Label More…

  • Rapid plant response
  • Corrects Iron deficiencies

Harrell’s MAX® Long Iron’s formulation provides safe and compatible mixing with amine based herbicides. Long Iron will mix with most commonly used herbicides, pesticides, fertilizers, and fungicides. Tank mixture compatibilities may vary because changes in formulations, water sources, temperature, and spray volumes. Always conduct a jar test for compatibility before tank mixing. GUARANTEED ANALYSIS
  • Nitrogen (N) 15.00%
    15.00% Urea Nitrogen*
  • Sulfur (S) 3.00%
    3.00% Combined Sulfur
  • Iron (Fe) 6.00%
    6.00% Chelated Iron
Derived from: Low Biuret Urea and Ferrous Sulfate.
*7.50% Urea Nitrogen stabilized with dicyandiamide and N-(n-butyl) thiophosphoric triamide.
Harrell's Max Copper 2.5 Gal 200252 SDS Label More…

  • Essential for photosynthesis and plant reproduction
  • Increases sugar content, improves color and improves flavor of fruits and vegetables

Harrell’s MAX Copper is designed to help overcome copper deficiencies in ornamentals. Copper sulfate has long been used in ornamental production for its fungicidal and bacterial properties. Specifically formulated to catalyze several plant processes. GUARANTEED ANALYSIS
  • Copper (Cu) 5.10% 5.10%Water Soluble Copper
  • Sulfur (S) 2.00%
Derived from: Copper Sulfate
Harrell's Orn Max 9-3-6, 2.5 Gal 200291 SDS Label More…

  • Designed for quick green-up and growth
  • Formulated with a complete micronutrient package

Harrell’s MAX Ornamental 9-3-6 High Nitrate Formula has been specially formulated with the optimum 3-1-2 ratio for quick green-up, quality growth and includes a complete micronutrient package. Before using this product read entire label for uses, product information and first aid. GUARANTEED ANALYSIS
  • Nitrogen (N) 9.00%
  • Available Phosphoric Acid (P2O5) 3.00%
  • Soluble Potash (K2O) 6.00%
  • Calcium (Ca) 2.00%
  • Magnesium (Mg) 0.50%
  • Boron (B) 0.01%
  • Copper (Cu) 0.01%
  • Iron (Fe) 0.10%
  • Manganese (Mn) 0.02%
  • Molybdenum (Mo) 0.002%
  • Zinc (Zn) 0.01%
  • Nickel (Ni) 0.002%
Derived From: Calcium Nitrate, Potassium Nitrate, Phosphoric Acid, Magnesium Nitrate, U-32, Copper-EDTA, Iron-EDTA, Mn-EDTA, Zn-EDTA, Sodium Borate, Sodium Molybdate and Nickel Nitrate.

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