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One of the challenges faced by hydroponic growers is providing the necessary nutrients for plant growth. While synthetic nutrients are commonly used in hydroponics, organic nutrients can also achieve optimal plant growth and health.

This article will explore how to use organic nutrients in hydroponics and their benefits.

In addition to organic nutrients, organic hydroponic systems utilize natural pest control measures such as beneficial insects, neem oil, and garlic sprays rather than synthetic pesticides.

It is important to note that building and maintaining an organic hydroponic system requires careful planning and attention to detail. Growers must ensure the system is properly balanced and the plants receive the nutrients needed to thrive.

Hydroponic in the vast greenhouse.Aquaculture. Herb plantation with watering system.Efficient and innovative agriculture cultivation. Hundreds of plants are growing on a farm. Food production. Closeup.
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Advantages of Using Organic Nutrients in Hydroponics

  • Organic nutrients are derived from natural and renewable sources, making them a more sustainable option than synthetic nutrients. Using organic nutrients in hydroponics can help reduce the environmental impact of hydroponic systems.
  • Organic nutrients can promote healthier plants by providing a range of micronutrients that are not found in synthetic nutrients. They can also encourage the growth of beneficial microorganisms in the root zone, improving plant health and resistance to pests and diseases.
  • Plants grown with organic nutrients often have a better flavor and aroma than synthetic ones. This is because organic nutrients can improve plants’ nutrient uptake and metabolic processes, resulting in higher-quality crops.
  • Organic nutrients are free of synthetic chemicals and pesticides, reducing the risk of exposure to harmful substances for growers and consumers.
  • Organic nutrients can improve the health of the soil in hydroponic systems by promoting the growth of beneficial microorganisms and improving soil structure.

Best Types of Organic Nutrients for Hydroponics Growing

Organic fertilizers for hydroponics are natural materials that provide essential nutrients to plants in a hydroponic system. They can be derived from plant, animal, or mineral sources and are often preferred by growers because they are free of synthetic chemicals and pesticides.

These organic fertilizers for hydroponics can be used alone or in combination to provide a complete range of nutrients to plants in a hydroponic system. They are often used with natural pest control measures to create a completely organic and sustainable hydroponic system.

Choosing the right organic nutrient for your hydroponic system will depend on your plants’ specific needs and the soil’s nutrient content. Experimenting with different types of organic nutrients can help you find the best option for your hydroponic growing needs. Below, we will explore some of the best types of organic nutrients for hydroponic growing.

Manure-Based Nutrients

Manure-based organic nutrients are derived from animal waste, such as cow or horse manure, and can be used in various forms. These nutrients are rich in organic matter and provide a diverse range of micronutrients and beneficial microorganisms to plants.

Compost Tea

Compost tea is made by steeping compost in water. It can be used as a foliar spray or added directly to the hydroponic system to improve plant growth and nutrient uptake.

Fish Meal

Fish meal is a popular organic nutrient made from ground-up fish. It is high in nitrogen, phosphorus, and micronutrients and provides a quick source of plant nutrients.

Gypsum-Based Nutrients

Gypsum-based organic nutrients, such as calcium sulfate, are commonly used to provide plants with a source of calcium and sulfur. These nutrients are particularly important for plants during the early stages of growth and can improve overall plant health and vigor.

Bone Meal

Bone meal is a popular organic nutrient made by grinding up animal bones. It is high in phosphorus and calcium and provides a slow-release source of nutrients to plants. Bone meal can be added directly to the hydroponic system or used to make a nutrient tea.


Guano is an organic nutrient made from bird or bat droppings. It is high in nitrogen, phosphorus, and micronutrients and provides a quick source of nutrients to plants. Guano can be added directly to the hydroponic system or used to make a nutrient tea.

Are All Hydroponic Nutrients Organic?

Most hydroponic nutrients are not organic; instead, they contain synthetic nutrients. Synthetic nutrients are deemed easier to formulate and provide more precise control over the nutrient solution.

Synthetic nutrients are formulated to contain precise amounts of essential nutrients such as nitrogen, phosphorus, and potassium, which are necessary for plant growth. These nutrients are in a form that is readily available to plants, which can result in faster growth and higher yields.

Synthetic nutrients have a longer shelf life and are less likely to contain harmful microorganisms than organic nutrients, which can be a concern in hydroponic systems where water is recirculated.

Another reason most hydroponic nutrients are not organic is that they are often cheaper and more widely available than organic alternatives. The demand for hydroponic nutrients has increased in recent years, and synthetic nutrients have become the norm in the hydroponic industry.

However, there is a growing interest in organic hydroponics, and more organic hydroponic nutrient options are now available. While they may be more expensive and require more attention to detail, organic hydroponic nutrients can produce high-quality crops free of harmful chemicals.

The best way to prevent synthetic chemicals from entering your hydroponic system is to avoid using them altogether. This means carefully selecting all materials that come into contact with the plants and monitoring the air quality of your growing location.

Purity Wamoyi
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Purity Wamoyi is a horticulturist. She studied BSc Horticulture at the University of Nairobi. She has a passion for agriculture driven by her urge to be a champion and ambassador in fighting for food security.She believes that the world would be a better place if we did the little things that bring peace and uphold humanity. During her free time, Purity loves watching soccer and is a huge ardent Chelsea fan.

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