Why are Humic and Fulvic Acids so good for plants?

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The composition of your soil plays a critical role in your plant’s health and development

In nature, plants grow according to the chemical composition of the ground where their seeds happen to fall. Sometimes, this means growing in a fertile, flourishing environment that promotes optimal development for the plant. Other times, it means a shorter lifespan, fewer flowers or seeds, or lower quality vegetation because the soil is deficient of organic nutrients.

To get the best results from your plants, you must provide an environment conducive to optimal growth conditions. The fertility of soil (or nutrient solution in hydroponics) is paramount to achieving big results. It’s no secret that plants grow best when roots develop in a medium rich in organic matter. Make the most out of your plant’s potential by learning how to use Humic and Fulvic acid.


Humic and fulvic acids are produced by the natural decomposition process of vegetation. Both are commonly used in organic crop production, greenhouse cropping of vegetables, and in horticultural programs. They also may have uses in different large-scale production systems to improve seedling health and plant response to stress. For plants, humic and fulvic acids are chelators, meaning they combine minerals to make them into organic compounds that can be taken up by plants more easily. They also enable the soil to retain more water and can increase the water infiltration of the soil for hard soils. Additionally, humic and fulvic acids restrict toxins present in the soil, reducing the amount of harmful substances that reach the crop’s roots. Humic and fulvic acids are essential for healthy plant growth. They help to increase the nutrient uptake of plants and can condition soil for a more efficient use of fertilizers. They help in establishing healthier roots, help increase yield and are beneficial for overall better plant development.


When trees or plants die, microorganisms help decompose organic matter into humus. Humic and fulvic acids are the end product of years of decaying organic plant material continually broken down by microbes from its prior humus form.

Humus is the dark-colored top layer of the soil. It’s very fertile and looks like compost, but is further digested than compost. It consists of organic digested plant and animal materials. As plant material degrades into compost, humus substances are created. From humus two soluble substances can be extracted: humic acid and fulvic acid.

Humic Acid Explained

Humic Acid is a soil conditioner that increases the ability of soil to retain nutrients and improve water-holding capacity. It enhances the soil’s ability to chelate (bind) nutrients and to promote exchange of nutrients between plants and the fertilizers being applied. The power of humic acids is due to its properties as a chelating agent. It attaches itself to micronutrients where it forms a bond so that the mineral can be more easily absorbed by plants. This results in better ion-exchange (Cation Exchange Capacity) and supports better buffering capabilities. When elements such as calcium, iron, magnesium, zinc and manganese can be absorbed more easily, it benefits both the growth of plant matter and root mass. The beneficial effect of adding humic acids can be observed in soil-based cultivation and hydroponic based systems.

Fulvic Acid Explained

Fulvic acid are natural nutrient carriers that forms bonds with minerals and travel up the plant to deposit trace elements in plant cells. Fulvic acid is capable of doing so by its unique property that it is free to bind to nutrients and minerals of equal and opposing electrical charges. Moreover, it is so small that it can move through the cell membrane. Fulvic acid has a lower molecular weight than humic acid. It has less carbon but higher oxygen content. Because of its lower molecular weight, it can easier penetrate plant leaves and the plant’s cells. It enhances cell division and magnifies root growth. Because of the unique characteristics of fulvic acid, it is very efficient when applied as a root drench or foliar spray.


Ajent 811 Potassium Humate and Fulvate is 100% water soluble and can be used in foliar sprays or in drip systems, or as an additive in a hydroponic systems. In granular form Ajent 811 works great with conventional soil application. For best results, use in conjunction with macronutrient fertilizers such as Hyfer Plus Green Growth Enhancer or Peters Hi-Nitro 30-10-10 Fertilizer.

Using Ajent 811 for plants will help them reach their maximum potential by improving the soil structure they grow on. Enhancing your farm productivity with humates doesn’t have to be complicated or expensive — when you use Ajent 811’s Potassium Humate and Fulvate, it results in healthier and bountiful crops.


Humic substances have three types of effect on soil and plants:

  1. Physically modifying the structure of soil.
  2. Chemically change the properties of soil.
  3. Biologically stimulate the plant and activities of micro-organisms.

Physical Benefits:

  • Improves cation exchange capacity (CEC) and water holding ability.
  • Promotes better soil structure.
  • Improves retention and uptake of essential nutrients.
  • Increases the effectiveness of applied fertilizers.

Chemical Benefits:

  • Act as a natural chelator (by providing a high cationic exchange capacity) to improve the uptake of minerals, nutrients, and trace elements by plants.
  • Act as a buffer to neutralise alkaline and acidic soils, freeing many previously bound trace elements.
  • Stabilize or assist in the degradation of toxis substances (including toxic pesticides)

Biological Benefits:

  • Stimulate the growth and proliferation of beneficial soil organism.
  • Enhance root initiation and improve root growth.
  • Accelerate seed germination.
  • Regulate hormone levels in stressed plants.


Broadcast Application

Use Ajent 811 at 1Kg/ha plus recommended macro fertilizer for basal application before seeding.

Spray Application

Use Ajent 811 at 1Kg/200L of water per hectare or 80g/16L water for knapsack sprayer application. For small garden sprayers, use 5g/1L dilution rate.


Dissolve 5gr of Ajent 811 with 1L container of water to reach a 1000ppm solution. Add into reservoir until you reach your desired TDS/PPM (and EC) relative to your plant stage. One 100gm packet makes 20 bottles of 1L nutrient solution!