How to Use Potassium Humate for Plants? Benefits

When it comes to growing healthy plants and flowers, fertilizing your soil is essential. One of the best fertilizers for plant growth is potassium humate, a type of humic acid that is derived from organic matter. 

What is Potassium Humate and How Does it Work?

How to Use Potassium Humate for Plants

Definition and Explanation of Potassium Humate

Potassium humate is a type of humic acid that is obtained by extracting humic acid from organic matter such as decayed plant and animal materials. 

It is produced by the chemical and biological reactions that occur during the decomposition of organic matter. It is an excellent fertilizer due to its high nutrient content and ability to improve soil structure and water retention.

How Does Potassium Humate Work?

Potassium humate works by increasing the exchange capacity of the soil. The exchange capacity is the soil’s ability to retain and exchange ions, which is essential for plant growth. 

Potassium humate increases the exchange capacity of the soil by providing cation exchange sites that allow plant roots to absorb more nutrients such as nitrogen, phosphorus, and potassium. It also improves soil structure and water retention, which helps plants grow better and resist drought conditions.

What Are the Benefits of Using Potassium Humate?

There are numerous benefits of using potassium humate as a fertilizer, including:

  • Improves soil structure and water retention
  • Increase plant growth and yield
  • Enhances nutrient absorption and foliar spray uptake
  • Promotes healthier root development
  • Reduces the negative impact of salt stress and heavy metals

How to Use Potassium Humate for Plants

Application Methods

Potassium humate can be applied to plants in several ways, such as:

  • As a base fertilizer during planting
  • In foliar sprays
  • As an additive to irrigation water

Recommended Dosage

The recommended dosage of potassium humate varies depending on the type of soil and plant being grown. For sandy soil, apply 150-300 KG per hectare. 

As a general guideline, a dose of 2-4 kg per hectare is sufficient for most crops, while 0.5-1 kg per hectare is recommended for fruit trees or specialty crops. The dosage can also be adjusted based on the level of humic acid content in the soil.

Application in Fruits

Potassium humate application in fruits has been proven to be an effective method to increase yield. The use of the humate product during the fruit-setting period can increase fruit size and overall yield. 

For fruit trees, apply 1-3 KG per tree, 4-5 times annually. For optimal results, apply during the flowering stage and germination period.

Why Potassium Humate is the Perfect Fertilizer

Improve Soil Structure

Potassium humate can significantly improve soil structure by increasing organic matter in the soil. This helps the soil hold more moisture and nutrients, which are essential for plant growth. 

Potassium humate also increases water holding capacity in soil, which is essential for plants that require ample water resources.

Enhance Nutrient Uptake

Potassium humate is a rich source of essential plant nutrients such as nitrogen, phosphorus, and potassium. It also helps to chelate nutrients, making them more available to plants. 

The application of potassium humate helps improve the uptake of nutrients, resulting in healthier plants.

Encourages Microbial Growth

Potassium humate stimulates the growth of beneficial microorganisms in soil, which help to decompose organic matter and make nutrients available to plants. 

Microbial activity in soil helps break down insoluble substances into soluble forms, which are more accessible to plants. This, in turn, positively impacts the overall soil fertility and plant growth.


Q: What is potassium humate?

A: Potassium humate is a humic acid derivative that is used as a plant growth stimulant and soil conditioner. It is made by extracting humic acids from peat, lignite or leonardite, then reacting them with potassium hydroxide to create potassium humate.

Q: How do you apply potassium humate?

A: Potassium humate can be applied in different ways depending on the stage of plant growth and the intended effect. It can be used as a foliar spray, soil drench, fertigation solution or seed treatment. It is important to follow the dosage instructions and application guidelines for each humate product.

Q: What is the dosage of potassium humate?

A: The dosage of potassium humate depends on the type of plant, soil condition, and stage of growth. Generally, the recommended dosage for potassium humate is 30-50 grams per acre or 5-10 kgs per hectare. It is usually applied a total of 4-5 times in a growing season.

Q: Does potassium humate increase yield?

A: Yes, potassium humate can increase crop yield by promoting root growth, improving nutrient uptake and increasing soil fertility. It can also enhance fruit quality and size.

Q: How does potassium humate improve soil?

A: Potassium humate increases soil cation exchange capacity, balances soil pH, and helps to retain moisture. It promotes the growth of beneficial soil microorganisms and improves soil structure, making it more suitable for plants to thrive in.

Q: Can potassium humate be used with other fertilizers?

A: Yes, potassium humate can be used with other fertilizers such as nitrogen fertilizer, trace elements and potassium salt. However, it is important to follow the recommended application rates and timing guidelines to avoid over-fertilization or nutrient imbalances.

Q: What is the best time to apply potassium humate?

A: The best time to apply potassium humate is during the seedling stage and fruiting stage of crop development. For seedlings, soak the seeds in an aqueous solution of potassium humate for 10-24 hours before planting. For fruits, apply 30-50 grams of potassium humate per plant or per meter square of soil.

Q: Is potassium humate compatible with pesticides?

A: Yes, potassium humate can be mixed with pesticides or herbicides to improve their efficacy and reduce their negative environmental impact. However, it is recommended to test the compatibility of the mixtures before applying them in the field.

Q: Can potassium humate improve drought resistance?

A: Yes, potassium humate can help to improve drought resistance in plants by increasing water uptake, enhancing root growth and reducing moisture stress. It can also promote the synthesis of stress-resistant compounds in plants.

Q: How does soaking seeds in potassium humate improve germination?

A: Soaking seeds in potassium humate solution before planting can help to improve seed germination by enhancing seedling vigor and root growth. It can also protect the seeds from soil-borne diseases and insect pests.


Potassium humate is a highly beneficial fertilizer that can improve soil health, increase plant growth and yield, and enhance nutrient uptake. 

Its versatile application and dosage options make it suitable for a wide range of crops and soil types, making it an excellent choice for anyone looking for an effective organic fertilizer.

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