Close this search box.

The Role of Cobalt Fertilizers on Plant Growth

Explore the vital role of cobalt in agriculture, its functions in plant growth, and the impact of its deficiency and overdose on crop yield and health.

Table of Contents

Cobalt is found as one of the essential micronutrients. It promotes plant growth, and it is helpful for nitrogen fixation. However, Cobalt’s specific requirement is to increase stem growth, metabolism, transpiration, and other functions to improve crop yield. 

In this article, I will elaborate on the role and function of cobalt and cobalt fertilizers in plant growth. Moreover, it includes the effects of cobalt deficiency and overdose in plant life, which shows the importance of Cobalt in agriculture. 

Forms and Sources of Cobalt/ Cobalt Fertilizers in Agriculture

The most useable forms of Cobalt fertilizers for the plant’s growth are as follows: 

  • Cobalt Sulfate
  • Cobalt Nitrate
  • Cobalt Chloride
  • Cobalt-6 liquid Cobalt

Normal Cobalt Concentration in Plants

Cobalt is a transition element that must be used properly and in a specific quantity. It is used according to the soil requirements and status of the soil. The concentration of the 0.1–10 μg g−1 dry weight is said to play an important role in the growth of the plants. The recommended amount of Cobalt sulfate per acre per year is 200-800 grams.  

Plants that Require High Amounts of Cobalt Fertilizers

Require High Amounts of Cobalt Fertilizers

Almost all plants require Cobalt for their growth and productivity. However, some of the following fertilizers require it in high concentrations that are as follows: 

  • Grazing plants 
  • Lawn plants
  • Leguminosae family
  • Marine algal species
  • Agricultural lands 

Brief Analysis of the Roles of Cobalt in Plants 

Cobalts perform major roles in promoting the growth of plants. Some of the roles of Cobalt and its fertilizers on plants and overall crop production are as follows:

  • Stem Growth 

Cobalt is necessary for stem growth. The elongation of plant stems can be increased using the Cobalt in the soil. Stem growth promotes the production and overall crop yield as well. As a result, the plants with improved stem growth produce more than most other plants. 

  • Bud Development

The healthy bud development is necessary for the healthy growth of the plants. Cobalt fertilizers affect plant growth positively with time and produce bud essentials for plant growth.

  • Absorption and Metabolism

It performs and activates the metabolism of the plants. It performs its functions in plants by absorbing and metabolizing carbohydrates and fats. 

  • Nitrogen Fixation

Nitrogen is present in the air, but it is not in a usable form. Therefore, there’s a need to fix Nitrogen in the plant roots. In legumes, Cobalt helps out with the enzymes to fix the Nitrogen. In this way, it improves the nitrogen level in the plant roots, which are essential for plant growth and development.

  • Growth Regulator 

Cobalt acts as a Growth regulator in the plants. It improves the plant’s overall structure and production, including leaves, stems, and root hairs. If the plant passes through any stress conditions, it works as a supporter and recovers the plant from stressed conditions. 

  • Drought and Heat Tolerance 

Due to the current ongoing environmental conditions, the plants are facing drought and heat conditions more often. Plants need to survive in these conditions for healthy and improved growth. Due to the presence of Cobalt, plants can easily pass through these rough conditions. 

  • Cellular Homeostasis and Interaction with Other Elements

Cobalt fertilizers are important for promoting the interaction of plants with zinc, nickel, and iron. I also maintain the concretions of the micronutrients as well. 

  • Role in Transpiration 

The presence of the Cobalt is essential for the process of transpiration

  • Production of Antioxidants in Plants

An adequate amount of Cobalt in the soil also improves plant immunity against diseases and prevents them from pests. Cobalt promotes the production of antioxidants in the plant. They also prevent the plant from stress conditions. 

  • Essential for Cell Growth

Plants require Cobalt as a growth promoter. Plant cell growth requires Cobalt as an essential ingredient for maintaining plant growth. 

  • Formation of Vitamin B12

Vitamin B12-Cobalt Fertilizers

Cobalt acts as the building block for the production of vitamin B12. This vitamin is important for the overall productivity of plants and helpful in the functions of plant organs. Moreover, vitamin B12 is also important in photosynthesis and chlorophyll formation. 

  • Improvement of Soil Fertility Level and Production

For healthy plant growth, healthy soil is required. Soil is fertile soil if it includes the nutrient concentration in it with all the growth promoters in it. It also promotes the production of healthy bacteria and other microorganisms that are important for associating with the plant roots. The presence of Cobalt within the grass also improves the health of the grazing animals. It increases the overall productivity of the soil by improving the soil fertility.

Specific Roles of Cobalt Derivatives in Plant Growth

Cobalt is the necessary element for the high production rates. The presence of Cobalt in plants prevents them from environmental attacks, and it also improves their productivity. Following are the most important roles of the Cobalt fertilizers that are:

Cobalt Sulfate                     

It improves the lead disc structure within the plants. It steadily improves the overall productivity rate of the plants. It conducts various reactions in the plant parts, including chemical and biological reactions.

Cobalt Nitrate

It improves the soil fertility level near the plant roots. It maintains the presence of the micronutrients in the soil. However, users need to proceed with care in Using its amounts. The higher concentrations of the

Cobalt Chloride

It’s important for the overall growth of the plant stems. Besides this, it is also important for expanding the lead discs. It’s the most critical element the plant parts require to develop the cellular and tissue structure. It promotes the formation of healthy buds within the plants. It makes them reachable towards maturity. It improves the fertility capacity of the soil with the development of healthy microorganisms.

Cobalt-6 Liquid Cobalt

This fertilizer type is important for translocating trace elements within the plants. It improves the development rate of the plants. It’s supportive of the legume nodulation. This form of Cobalt promotes the structure and increases the leaf size in plants. In case of any environmental stress, Cobalt helps the plant to recover speedily. It increases the chances of forming healthy microbial interactions within the soil. 

Deficiency and Overdose Effects of Cobalt on Plants

It’s important to use the balanced and right concentration of the Cobalt in plants for development and growth. The deficiency and overdose of Cobalt leaves remarkable effects on plant growth that are as follows:

Effects of Cobalt Deficiency on Plants

The deficiency of the Cobalt in plants decreases the overall growth rate and productivity. With the consistent deficiency of Cobalt, the biochemical and psychological functions of the plants start to decrease and can stunt plant growth.

  • It promotes the redness of the plant stems and leaves. 
  • It reduces and stops the growth of plants.

Effects of Cobalt Overdose on Plants

  • When there are high concentrations of Cobalt in the plants, it results in phytotoxicity.
  • High concentrations of Cobalt can cause the discoloration of the plant leaves and increase the loss of leaves. 
  • It also promotes the deficiency of iron in the plants.
  • Its high concentrations act as a contaminant in the soil instead of promoting plant growth.

An Outlook on the Benefits of Cobalt in Crops and Soil

the Benefits of Cobalt in Crops and Soil

Through a series of research, it’s recently become clear that Cobalt is one of the essential plant nutrients. It performs various functions and features within the plants that promote plant and crop growth and development. Some of the most important benefits of cobalt fertilizers in plants are as follows:

  • These are a must for nitrogen fixation in plants.
  • Cabbage requires a lot of Cobalt for its growth. Using cabbages in your diet is a great way to utilize Cobalt.
  • They resist the parasites that can affect the growth of plants. It improves plant growth with time.
  • It is supportive of the translocation of the trace elements from the soil to the plants.
  • It supports and improves microbial interactions with the plants. These associations benefit agricultural growth and increase the production rate.
  • It’s important to promote root and overall plant growth in lower and higher plants.
  • Cobalts improve the system of metabolism in plants.     


Cobalt acts as an essential growth promoter for the plant and increases the yield gradually by promoting the soil’s fertility and the functions of the plant parts. You must provide adequate fertilizers to the plants because these are essential for the production of buds, stem elongation, and nitrogen fixation. However, you have to proceed with the concentration of the Cobalt carefully. The excessive use of Cobalt can cause plant redness and even kill the plants. 

Get Support Today

Contact HANS now for any support

Lasted Articles for You

Green grass and vibrant flowers basking in the sunlight creating a picturesque scene of natural beauty

What Is Superphosphate: Do I Need Superphosphate In My Garden

Discover how superphosphate can boost garden health, enhancing growth, blooms, and root systems. Perfect for phosphorus-depleted soils.

A woman holds a basket of vegetables and apples showcasing the benefits of using organic fertilizers to increase crop yield

The Best Organic Fertilizers to Double Your Harvest

Discover the best organic fertilizers to enhance your soil and double your harvest. Learn about compost, manure, bone meal, and more for sustainable gardening.

Golden retriever happily running through grass with ball in mouth

Can Lawn Fertilizer Hurt My Pet?

Discover how to protect your pets from harmful lawn fertilizers with our guide on safe, pet-friendly products and practices.