Cannabis Plants Nutrient Requirements for Organic Feeding

Growing your own cannabis plants can be a rewarding and fulfilling experience, but it also requires some knowledge and effort. One important aspect of cannabis cultivation is understanding the nutrient needs of your plants. With so many different nutrients and feeding options available, it can be overwhelming to figure out the best approach. This article will provide a step-by-step guide to understanding the nutrient needs of your cannabis plants for organic feeding. Whether you are a beginner or an experienced grower, you will find valuable information about how to provide your plants with the nutrients they need to thrive.

The Importance of Organic Feeding


The Importance Of Organic Feeding
As a cannabis grower, one essential factor to consider is providing the plants with adequate nutrition for optimal growth and yield. While there are plenty of synthetic fertilizers available in the market, more and more growers are recognizing the importance of organic feeding. Using organic nutrients not only enhances the quality and flavor of the final product, but it also promotes the health of the soil, plants, and environment as a whole. In this section, we will delve into the reasons why organic feeding is crucial for your cannabis plants, the advantages and disadvantages of using organic nutrients, and how to ensure that your plants receive the necessary nutrients they need to flourish.

Why Choose Organic Feeding?

Many cannabis cultivators choose to feed their plants with organic nutrients for a variety of reasons. Here are some of the main benefits of organic feeding:

  • Improved Flavor and Aroma: Organic nutrients can contribute to a more complex and nuanced bouquet of flavors and aromas in the finished product. This is because they contain a wider range of micronutrients and beneficial microbes that help the plant develop its unique terpene profile.
  • Reduced Environmental Impact: Organic nutrients are derived from natural sources such as compost, manure, and seaweed, rather than synthetic chemicals. This means that they are generally more sustainable and environmentally friendly than their chemical counterparts.
  • Healthier Soil: The use of organic nutrients can lead to healthier and more fertile soil. This is because they support the growth of beneficial microbes and fungi that can improve soil structure and nutrient-holding capacity.
  • Reduced Risk of Overfeeding: Unlike chemical fertilizers, organic nutrients release their nutrients slowly over time, which makes it less likely that you will overfeed your plant and cause nutrient burn.

While there are many benefits to organic feeding, it’s important to keep in mind that there may also be challenges associated with this approach. Some of the main drawbacks include:

  • Slower Nutrient Uptake: Organic nutrients generally take longer to break down and become available to the plant than chemical fertilizers. This means that you may need to plan your feeding schedule accordingly.
  • Variable Nutrient Content: Organic nutrients can be difficult to measure and may vary in nutrient content from batch to batch. This can make it harder to achieve precise nutrient balances.
  • Potential for Contamination: Organic nutrients derived from animal sources such as manure or bone meal may contain pathogens or contaminants such as heavy metals. It is important to source these inputs carefully and ensure that they are properly composted and tested before use.

Organic feeding can be a great choice for cannabis cultivators who value sustainability, soil health, and flavor complexity. However, it is important to be aware of the potential challenges and to approach this approach with care and attention to detail.

Pros and Cons of Organic Feeding

Organic feeding is a method of nurturing plants with natural, organic nutrients instead of synthetic ones. This approach has its own pros and cons, which are important to consider before deciding whether to use organic feeding or not. Here are some of the advantages and disadvantages:


  • Organic feeding promotes a healthier and more sustainable environment.
  • Organic nutrients tend to break down slowly, providing nutrients over a longer period of time.
  • Organic nutrients are generally less expensive than synthetic ones.
  • Using organic nutrients can improve the taste, smell, and potency of your cannabis plants.
  • Organic feeding can help improve soil quality over time by fostering beneficial soil microbes.
  • Organic nutrients can be easily sourced from common organic materials, reducing the environmental impact of plant nutrition.


  • Organic feeding can take more time and effort than using synthetic fertilizers.
  • Organic nutrients are less precise than synthetic ones, making it more difficult to control the amount of nutrients being delivered to your cannabis plants.
  • Organic nutrients can sometimes contain higher levels of contaminants such as heavy metals and pesticides.
  • Organic feeding may not be suitable for hydroponic or aeroponic growing methods.

In sum, organic feeding has many benefits such as promoting a more sustainable environment, improving soil quality, and enhancing the taste and potency of your plants. However, it can be time-consuming, imprecise, and may not be suitable for some growing methods. It’s important to weigh the pros and cons before making a decision about organic feeding for your cannabis plants.

Understanding Nutrient Needs

Understanding Nutrient Needs
Growing cannabis plants requires proper understanding of their nutrient needs. Without proper nutrition, your plants may not grow to their full potential or may even die. The key to successful cannabis cultivation is to understand the nutrient requirements of your plants and provide them with the necessary nutrients. In this section, we will discuss the NPK ratio, secondary macronutrients, micronutrients, and beneficial microbes that are important for the healthy growth of your plants. By the end of this section, you will have a better understanding of the nutrients your cannabis plants need and why.

NPK Ratio

One of the key factors in understanding the nutrient needs of your cannabis plants is the N-P-K ratio, which stands for nitrogen, phosphorus, and potassium. These macronutrients are necessary for proper growth and development.

Nitrogen: Nitrogen is essential for vegetative growth and helps to give your plants a lush green appearance. However, too much nitrogen can lead to excessive foliage growth at the expense of flowers or buds.

Phosphorus: Phosphorus is critical for root development, as well as flower and fruit production. It also plays a role in photosynthesis and energy transfer within the plant.

Potassium: Potassium plays a role in water uptake and regulation, as well as enzyme activation and overall plant health. It can also help to increase the size and density of buds.

Different stages of plant growth require different ratios of these macronutrients. In general, cannabis plants require higher levels of nitrogen during the vegetative stage and higher levels of phosphorus and potassium during the flowering stage.

Here is a table that shows the ideal N-P-K ratios for different stages of cannabis growth:

Stage Nitrogen (N) Phosphorus (P) Potassium (K)
Seedling 0-2 4-6 2-4
Vegging 4-6 2-4 4-6
Pre-flowering 2-4 4-6 6-8
Flowering 1-3 6-8 9-11

It’s important to note that these ratios are not set in stone and may vary based on the specific strains or cultivars of cannabis you are growing. Additionally, other factors such as pH and environmental conditions can also impact nutrient absorption and utilization by your plants. That’s why it’s important to monitor your plants closely and adjust your feeding regimen as needed to ensure optimal growth and yields.

Secondary Macronutrients

Secondary macronutrients are essential to the growth and development of cannabis plants. These are nutrients that are needed in larger quantities than micronutrients, but less than primary macronutrients. The three secondary macronutrients that plants need are Calcium, Magnesium, and Sulfur.

Calcium: Calcium is essential for cell wall development and strong stems. It also plays a role in enzymatic and metabolic processes of the plant. A deficiency in calcium can cause stunted growth, leaf distortions, and ultimately, plant death. Calcium can be found in dolomite, gypsum, and limestone.

Magnesium: Magnesium is important for photosynthesis, enzyme activity, and the formation of chlorophyll. A lack of magnesium can lead to yellowing of leaves between veins, which is known as interveinal chlorosis. Epsom salt is a good source of magnesium and can easily be added to soil or nutrient solution.

Sulfur: Sulfur is essential for the production of amino acids and proteins in the plant. It is also important for root development and disease resistance. A sulfur deficiency can cause yellowing of leaves similar to that of magnesium deficiency. Sulfur can be found in gypsum and elemental sulfur.

It is important to maintain a proper balance of secondary macronutrients, as an excess or deficiency of one nutrient can affect the uptake of another. By providing adequate amounts of calcium, magnesium, and sulfur, cannabis plants will be able to reach their full potential and produce high-quality yields.


Micronutrients are essential for the healthy growth of cannabis plants. These elements are required in smaller amounts but are no less important than macronutrients.

The following are the essential micronutrients required for optimal growth:

Element Function
Boron (B) Required for cell wall integrity, protein synthesis, and hormone regulation.
Chlorine (Cl) Required for photosynthesis and osmotic regulation.
Copper (Cu) Required for photosynthesis, respiration, and enzyme function.
Iron (Fe) Required for chlorophyll synthesis, respiration, and enzyme function.
Manganese (Mn) Required for photosynthesis, enzyme function, and nitrogen metabolism.
Molybdenum (Mo) Required for nitrogen fixation and enzyme function.
Nickel (Ni) Required for urease enzyme function.
Zinc (Zn) Required for enzyme function, protein synthesis, and hormone regulation.

Without these micronutrients, cannabis plants can suffer from a range of nutrient deficiencies. For example, a lack of boron can cause the growing points to die, while a lack of manganese can cause yellowing between veins on newly formed leaves.

It is important to note that, while micronutrients are required in smaller amounts than macronutrients, they are just as critical to plant health. A well-rounded nutrient program should provide ample micronutrient supplementation to ensure healthy growth and development.

Beneficial Microbes

Beneficial microbes play a crucial role in maintaining the health and vitality of your cannabis plants. These tiny creatures work in tandem with your plant’s roots to break down organic matter and make nutrients more readily available. They can help protect against harmful pathogens and improve soil structure. Here are some of the most common beneficial microbes that you can incorporate into your organic feeding regimen:

Microbe Function
Mycorrhizal Fungi This fungus forms a symbiotic relationship with your plant’s roots, extending their reach and helping the plant absorb more nutrients and water.
Bacillus Subtilis This bacteria can help protect against harmful pathogens, while also improving soil structure and promoting plant growth.
Lactobacillus This bacteria can help break down organic matter, making nutrients more readily available to your plants. It also helps regulate soil pH levels and can protect against harmful pathogens.
Trichoderma This fungus benefits plants by breaking down organic matter, promoting root growth, and improving soil structure. It can also help protect against root pathogens.
Rhizobacteria These bacteria form a symbiotic relationship with your plant’s roots and can help fix nitrogen from the air, making it available to your plants.

These beneficial microbes are typically found in organic soil mixes and can also be incorporated into compost teas or other organic nutrient applications. By encouraging the growth of these microbial populations, you can create a thriving ecosystem in which your cannabis plants can grow strong and healthy.

Common Organic Nutrients

Common Organic Nutrients
As organic feeding gains popularity among cannabis cultivators, it’s important to understand the various sources of nutrients that can be used to ensure optimal growth and harvest. From compost and manure to kelp and fish emulsion, there’s no shortage of options when it comes to organic nutrients. In this section, we’ll explore some of the most common and effective organic nutrient sources for cannabis plants, highlighting their benefits and potential drawbacks.

Compost and Compost Tea

Compost is one of the most popular organic nutrient options for cannabis plants. It is a natural slow-release source of nutrients, which is produced by the breakdown of organic matter such as leaves, fruits, vegetables, and plant trimmings. Compost is rich in nitrogen (N), phosphorus (P), and potassium (K) – the three primary macronutrients needed by cannabis plants.

Compost Tea is a nutrient-dense liquid fertilizer that is made by steeping compost in water. The brewing process removes the soluble plant nutrients from the compost and makes them readily available for uptake by the plants. This makes compost tea an excellent organic fertilizer option for cannabis plants in both vegetative and flowering stages.

Compost and compost tea can provide a wide range of secondary macronutrients and micronutrients that include calcium, magnesium, sulfur, iron, and manganese. Also, compost and compost tea contain beneficial microbes, such as bacteria and fungi that are essential for soil health and nutrient uptake.

Here is a table outlining the nutrient content of compost and compost tea:

Nutrient Compost % Compost Tea ppm
Nitrogen (N) 1.5 – 2.5 500 – 1500
Phosphorus (P) 1.0 – 1.5 100 – 500
Potassium (K) 1.0 – 1.5 500 – 1000
Calcium (Ca) 0.3 – 2.5 200 – 400
Magnesium (Mg) 0.2 – 1.0 20 – 50
Sulfur (S) 0.2 – 0.5 10 – 30

The nutrient levels in compost tea can vary depending on the brewing process, such as the steeping time and the ratio of compost to water. Compost tea can be applied through the soil or as a foliar spray on the leaves. It is essential to strain the compost tea before application to prevent clogging of the sprayer.

Compost and compost tea are an ideal nutrient option for organic cannabis cultivation. They are a sustainable and cost-effective way to provide essential nutrients and microbes to the soil, resulting in healthy and robust cannabis plants.

Manure and Guano

Manure and guano are popular organic nutrients for cannabis plants. Both of these organic fertilizers provide a range of nutrients that are highly beneficial for the growth and development of cannabis plants.

Manure is animal waste that has been decomposed by microorganisms over a period of time. When properly composted, manure can provide a rich source of organic matter, nitrogen, phosphorus, and potassium for cannabis plants. It is also a good source of beneficial microorganisms that help in nutrient absorption, disease resistance, and soil aeration.

There are different types of manure that can be used including cow, horse, chicken, and rabbit manure. Each type of manure has its own unique nutrient profile, so it’s important to choose the right type of manure based on the specific needs of the plants.

Guano is a natural fertilizer made from the droppings of seabirds and bats. It is rich in nitrogen, phosphorus, and potassium, and is also a good source of micronutrients, such as calcium and magnesium. Guano is known for its ability to improve soil structure, promote healthy root growth, and enhance the overall health and vitality of cannabis plants.

There are different types of guano available, such as seabird guano, bat guano, and worm castings. Each type of guano has unique properties that make it suitable for different stages of plant growth.

When using manure and guano as organic fertilizers for growing cannabis, it’s important to use them in moderation. Overuse of manure or guano can cause nutrient burn, which can harm the plants. It’s also important to properly compost or age the manure before application to reduce the risk of contamination from harmful pathogens.

Manure and guano are excellent sources of organic nutrients for cannabis plants. When used in moderation and with proper care, they can help maximize the health and yield of cannabis plants.

Bone Meal and Blood Meal

Bone meal and blood meal are two organic nutrient sources that are commonly used in cannabis cultivation. They are both high in essential macronutrients and provide a variety of benefits to your plants. Here are some key things to know about bone meal and blood meal:

Bone Meal:

  • Bone meal is made from crushed animal bones and is a slow-release fertilizer.
  • It is an excellent source of phosphorus, which is essential for healthy root growth, flowering, and fruit production.
  • Bone meal also contains calcium, which helps to build strong cell walls and prevent nutrient deficiencies like blossom end rot.
  • It has a neutral pH level, so it won’t affect the acidity of your soil.
  • Bone meal should be used sparingly, as too much phosphorus can actually harm your plants and cause nutrient imbalances.

Blood Meal:

  • Blood meal is made from dried animal blood and is a fast-release fertilizer.
  • It is high in nitrogen, which is necessary for healthy vegetative growth and overall plant vigor.
  • Blood meal also contains small amounts of phosphorus and potassium, as well as trace minerals like iron and zinc.
  • It has a low pH level and can make your soil more acidic, so it should be avoided if your soil is already acidic.
  • Blood meal should also be used in moderation, as too much nitrogen can cause your plants to grow too quickly and become susceptible to disease and pests.

When using bone meal and blood meal in your cannabis garden, it’s important to follow the manufacturer’s instructions and use them in combination with other organic nutrients for balanced nutrition. Too much of either one can cause nutrient imbalances and harm your plants. Additionally, if you are growing cannabis organically, make sure that the source of the bone meal and blood meal is also organic, as conventionally-raised animals may be treated with hormones and antibiotics that can have harmful effects on your plants and the environment.

Fish Emulsion

Fish emulsion is a common organic nutrient that is made from whole fish or parts of fish that are blended and fermented. This creates a potent fertilizer that is rich in nitrogen, phosphorus, and potassium, as well as several micronutrients.

Here are some of the benefits of using fish emulsion as an organic nutrient:

  • It is an excellent source of slow-release nitrogen, which helps plants maintain a steady growth rate.
  • It contains high levels of phosphorus, which is essential for strong root development.
  • It also contains potassium, which helps plants form sturdy stems and encourages flowering and fruiting.
  • The micronutrients in fish emulsion, such as calcium, magnesium, and iron, help plants perform a variety of physiological processes.
  • It is also a source of beneficial microbes that can help improve soil health and reduce plant diseases.

It is important to note that fish emulsion has a strong odor that is not always pleasant. It is also high in salt, which can be problematic for some plants. As with any organic nutrient, it is important to use fish emulsion in moderation and to follow the manufacturer’s instructions carefully.

Fish emulsion can be applied to soil as a liquid fertilizer or used as a foliar spray. It is also commonly used as an ingredient in compost tea. When purchasing fish emulsion, look for a product that is made from sustainable sources and free from harmful chemicals.

Kelp and Other Seaweeds

Seaweeds are a great source of organic nutrients for cannabis plants due to their high mineral content, including potassium, calcium, and magnesium. One of the more popular seaweed-based fertilizers is kelp, which is available in both liquid and dry forms. Kelp can be used during the vegetative stage of growth to promote healthy leaf and stem growth, as well as during the flowering stage to enhance bud development.

Aside from kelp, there are other seaweeds that can be used as a natural source of plant food. For example, bladderwrack and rockweed are also rich in minerals and can be found in dry or liquid form. These seaweeds contain natural plant hormones or gibberellins which stimulate growth and development in plants.

Using seaweed-based fertilizers provides your cannabis plants with a range of nutrients and minerals beneficial for their overall health and development. They also improve the soil structure by adding organic matter, and enhance nutrient uptake by the roots. The following table summarizes the key nutrients found in kelp and other seaweeds:

Seaweed Nutrient Content
Kelp High in potassium, calcium, magnesium, iron, zinc, and iodine. Contains natural plant hormones.
Bladderwrack Rich in nitrogen, phosphorus, potassium, calcium, and magnesium. Contains natural plant hormones.
Rockweed High in nitrogen, phosphorus, potassium, calcium, and magnesium. Contains natural plant hormones.

It’s important to note that seaweed-based fertilizers can vary in concentration and nutrient balance, so always follow the manufacturer’s instructions for application rates and timings. Over-fertilization can lead to nutrient burn which can damage or even kill your cannabis plants.

Earthworm Castings

Earthworm castings serve as an excellent organic nutrient for cannabis plants, providing a range of essential nutrients that are released gradually throughout the plant’s growth cycle. These castings, also known as vermicompost or worm poop, are rich in beneficial bacteria and microorganisms that help to boost plant growth and protect against diseases.

Some of the key benefits of using earthworm castings as a fertilizer include improving soil structure and drainage, as well as increasing the soil’s ability to retain water and nutrients. The castings are an excellent source of nitrogen, phosphorus, and potassium (NPK), as well as other secondary macronutrients and micronutrients such as calcium, magnesium, and iron.

When using earthworm castings, it is important to ensure that they are of high quality and free from contaminants such as pesticides and heavy metals. The best way to do this is to purchase castings from a reputable supplier, or to make your own using a worm composting bin.

To use earthworm castings as a fertilizer, mix them into the soil at a ratio of 5-10% by volume or use them as an top dressing by sprinkling a thin layer on top of the soil. For best results, it is also recommended to brew earthworm casting tea by steeping the castings in water and aerating the solution to promote the growth of beneficial microbes.

Earthworm castings are a highly effective organic nutrient that can help to improve soil quality, increase plant growth, and protect against diseases. When used properly, they are a safe and sustainable way to promote healthy, vibrant cannabis plants.

Mineral-based Nutrients

Mineral-based nutrients are a type of organic nutrient that contain minerals important to plant growth. These can include macronutrients like calcium, magnesium, and sulfur, as well as micronutrients like iron, zinc, and manganese. Unlike other organic nutrients like compost and manure, mineral-based nutrients are typically mined or extracted from natural sources like rock or sea deposits.

Types of Mineral-based Nutrients:

  • Dolomite Lime: A common mineral-based nutrient source that contains calcium and magnesium needed for strong cell walls and chlorophyll production. Dolomite lime can be added directly to soil or infused into soil as a solution.
  • Epsom Salt: Also known as magnesium sulfate, epsom salt is a popular mineral-based nutrient source that can help plants absorb other nutrients more efficiently. Epsom salt can be mixed with water and applied as a foliar spray or added to soil as a solution.
  • Gypsum: A calcium and sulfur-rich mineral-based nutrient that can help break up heavy clay soils, increase water retention, and promote strong root growth. Gypsum can be added to soil as a powder or infused into soil as a solution.
  • Rock Phosphate: A slow-release mineral-based nutrient source that contains phosphorus needed for root growth and flower development. Rock phosphate can be added directly to soil or infused into soil as a solution.
  • Azomite: A powdery mineral-based nutrient source that contains over 70 trace minerals needed by cannabis plants. Azomite can be mixed into soil, added to compost, or infused into soil as a solution.

While mineral-based nutrients can provide essential minerals that may be lacking in organic soils, they should be used sparingly as they can also build up in the soil and become toxic to cannabis plants. It is important to follow recommended application rates and monitor soil nutrient levels regularly to avoid over-fertilization.

Other Organic Nutrients

There are plenty of organic nutrients available for cannabis plants that don’t fit neatly into specific categories. These other organic nutrients can be just as beneficial for your plants, so don’t overlook them when creating a feeding schedule. Here are some examples of other organic nutrients and what they can do for your plants:

Organic Nutrient Benefits
Alfalfa Meal Contains nitrogen, potassium, and trace minerals; promotes root growth and overall plant health.
Bat Guano High in nitrogen, phosphorus, and potassium; boosts plant growth and yields.
Feather Meal Slow-release source of nitrogen; helps with vegetative growth and overall plant health.
Gypsum Calcium and sulfur supplement; improves soil structure and aids in nutrient absorption.
Humic Acid Increases nutrient uptake and promotes root growth; helps with overall plant health.
Molasses Source of carbohydrates for beneficial microbes; can also improve soil structure and aid in nutrient absorption.
Rock Dust Contains trace minerals and micronutrients; improves soil structure and overall plant health.
Soybean Meal Source of nitrogen and other nutrients; promotes vegetative growth and overall plant health.

When using other organic nutrients, be sure to pay attention to the recommended application rates and methods. Some may need to be mixed into the soil or incorporated into a compost tea, while others can be used as a foliar spray. Always follow the manufacturer’s instructions and monitor your plants closely for any signs of nutrient deficiencies or excesses. By incorporating a variety of organic nutrients into your feeding regimen, you can ensure that your cannabis plants receive a well-rounded diet for optimal growth and health.

How to Apply Organic Nutrients

After gaining a solid understanding of the nutrient needs of your cannabis plants for organic feeding, the next step is learning how to apply those nutrients effectively. Applying organic nutrients involves utilizing various techniques such as soil mixes, amendments, teas, and foliar sprays. This section will guide you through the different methods of application and help you determine which approach is best for your specific growth situation. By the end of this section, you will have a comprehensive understanding of the best ways to apply organic nutrients to your cannabis plants.

Soil Mixes and Amendments

One important way to apply organic nutrients to your cannabis plants is through soil mixes and amendments. This involves adding various organic materials to your growing medium to create a nutrient-rich environment for your plants. Here are some commonly used soil mixes and amendments for organic feeding:

Soil Mix/Amendment Description Benefits
Compost A mixture of decayed plant and animal materials Provides a wide range of macro and micronutrients, improves soil structure and water retention
Worm castings Waste material produced by earthworms that have consumed organic matter Rich in beneficial microbes and nutrients such as nitrogen, phosphorus, and potassium, helps with nutrient uptake and soil structure
Biochar A type of charcoal produced by heating organic materials in the absence of oxygen Increases water and nutrient retention, improves soil fertility and structure, supports microbial communities
Bone meal A powder made from ground animal bones High in phosphorus and calcium, helps with root development, flower and fruit production
Kelp meal A powder made from dried seaweed Rich in micronutrients such as iodine, potassium, and magnesium, supports plant growth and stress tolerance, stimulates root development

When incorporating these soil mixes and amendments into your growing medium, it’s important to consider the specific nutrient needs of your cannabis plants and adjust accordingly. Too much of certain nutrients can actually harm your plants, so it’s important to follow recommended application rates and monitor your plants closely for any signs of nutrient deficiencies or excesses.

Teas and Foliar Sprays

Organic teas and foliar sprays are two effective methods for delivering nutrients to your cannabis plants in a form that is easily absorbed. While both methods can benefit your plants, they are used in different ways and serve different purposes.

Organic teas are nutrient-rich liquids created by steeping various organic materials in water. The resulting brew is then strained and applied directly to the soil or roots of the plants. The nutrients in the tea are delivered to the plants in a natural and slow-release form, promoting healthy growth and development. Organic teas can also contribute to the health of your soil and the beneficial microorganisms that inhabit it.

There are many different types of organic teas that can be used to feed your plants. Some popular options include compost tea, worm tea, and seaweed tea. Each type of tea has its own unique nutrient profile and can be used at different stages of plant growth. For example, compost tea is typically used during the vegetative stage, while seaweed tea is commonly used during the flowering stage.

Foliar sprays, on the other hand, are nutrient solutions that are sprayed directly onto the leaves of the plant. This method of nutrient delivery allows the plant to quickly absorb the nutrients it needs, which can help to correct any deficiencies or imbalances. Foliar sprays are especially useful when your plants are experiencing stress, as they can provide a quick boost of nutrition to support recovery.

When using foliar sprays, it is important to use a fine mist and avoid spraying during the hottest parts of the day. This can help to prevent damage to the leaves and ensure that the nutrients are effectively absorbed. Some common organic foliar sprays include seaweed extract and fish emulsion.

While teas and foliar sprays can be effective methods for delivering nutrients to your cannabis plants, it is important to also use a balanced fertilizer and provide your plants with proper soil and environmental conditions. By using a combination of these methods, you can help to ensure that your plants receive all of the nutrients they need to thrive.

Organic Teas Foliar Sprays
Compost tea Seaweed extract
Worm tea Fish emulsion
Seaweed tea


In conclusion, understanding the nutrient needs of your cannabis plants for organic feeding is an essential aspect of a successful cannabis cultivation process. By choosing organic feeding, you provide your plants with natural and chemical-free nutrients that promote healthy growth, strong immunity, and high-quality yields.

As we’ve discussed, organic feeding has numerous benefits, including improved soil health, reduced environmental impact, and enhanced flavor and aroma of the final product. However, it also has its drawbacks, such as slow release of nutrients and increased maintenance requirements.

To utilize organic nutrients effectively, you need to understand the NPK ratio, secondary macronutrients, micronutrients, and beneficial microbes that your plants need, and choose the appropriate organic nutrient sources that fit your growing environment and goals.

Common organic nutrients for cannabis cultivation include compost, manure, guano, bone and blood meal, fish emulsion, kelp and other seaweeds, earthworm castings, and mineral-based nutrients.

When applying organic nutrients, you can mix them into your soil or create teas and foliar sprays that deliver nutrients directly to the plants’ roots and leaves.

Overall, organic feeding is a rewarding and ecologically responsible approach to cannabis cultivation that can produce high-quality, healthy, and sustainable yields. By following the guidelines and practices we’ve outlined in this article, you can unlock the full potential of your cannabis plants and enjoy the benefits of organic gardening.

Frequently Asked Questions

What is organic feeding when it comes to cannabis cultivation?

Organic feeding refers to using natural, organic substances to provide nutrients to cannabis plants rather than synthetic chemically-based fertilizers.

What are the benefits of organic feeding?

Organic feeding can enhance soil quality, promote growth of beneficial microorganisms, and produce healthier plants with richer flavors and aromas. It is also more environmentally-friendly and sustainable.

Are there any downsides to organic feeding?

Organic feeding may require more frequent applications and can be less precise in terms of nutrient delivery, potentially leading to over or underfeeding. It can also be more expensive and may require more labor and preparation.

What is NPK ratio and how important is it in organic feeding?

NPK ratio refers to the balance of nitrogen (N), phosphorus (P), and potassium (K) in organic fertilizers. It is important because it influences plant growth and development, from root development to flower production.

What are secondary macronutrients and why are they important?

Secondary macronutrients include calcium, magnesium, and sulfur. They are important for plant growth and health, aiding in chlorophyll production, photosynthesis, and enzyme activation.

What are micronutrients and why are they important?

Micronutrients refer to essential plant nutrients required in small quantities, including iron, zinc, manganese, and copper. They are important for various processes such as photosynthesis and enzyme activation.

What are beneficial microbes and how do they help cannabis plants?

Beneficial microbes are microorganisms that live in soil and help break down organic matter, release nutrients, and protect plants from harmful pathogens. They promote soil health and can enhance plant growth and resistance to stress.

What are the most common organic nutrients used in cannabis cultivation?

The most common organic nutrients are compost and compost tea, manure and guano, bone meal and blood meal, fish emulsion, kelp and other seaweeds, earthworm castings, mineral-based nutrients, and other organic amendments.

How can organic nutrients be applied to cannabis plants?

Organic nutrients can be applied through soil mixes and amendments, teas and foliar sprays, or organic mulches and top-dressings. The application method will depend on the specific nutrient and the stage of growth of the plants.

Is organic feeding a suitable method for all types of cannabis cultivation?

Organic feeding may not be suitable for all types of cannabis cultivation, such as hydroponics or other soilless systems. It may also require more experimentation and attention to ensure proper nutrient delivery and avoid overfeeding or nutrient deficiencies.


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