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Foliar Feeding: The Beneficial Practice for Cannabis Plants

18.04.2023 0

Growing cannabis plants requires careful attention and precision when it comes to providing the right nutrients. This includes providing the necessary macro and micronutrients through soil amendments and fertilizers. However, another effective way to supplement cannabis plants with the nutrients they need is through a process called foliar feeding. This perplexing technique involves spraying a nutrient solution directly onto the leaves of the plant, enabling it to directly absorb the nutrients through the stomata. In this article, we will explore what foliar feeding is, how it benefits cannabis plants, when to use it, how to apply it properly, and common mistakes to avoid.

What is Foliar Feeding?

Have you ever heard of plants being fed through their leaves instead of roots? Sounds strange, right? But this is exactly what foliar feeding is all about. It’s a process of fertilizing the plants by spraying a nutrient-rich solution onto their leaves. But wait, don’t plants absorb nutrients through their roots? How does foliar feeding work? Let’s dive into the details and find out.

How Does it Work?

Foliar feeding is the process of applying liquid fertilizer directly to the leaves of the cannabis plant. This method of feeding is highly effective, as the leaves can absorb nutrients up to 20 times faster than the roots.

How Does Foliar Feeding Work?

When nutrients are sprayed onto the leaves, they are taken in through small pores called stomata. These tiny openings, which are found on the surface of the leaves, allow the plant to take in gases and other substances that are vital for its survival.

Once the nutrient solution has been absorbed through the stomata, it is transported throughout the plant via the phloem and xylem, which are the plant’s vascular tissues that move fluids and nutrients from the roots to the leaves and back.

One of the key benefits of foliar feeding is that it allows the plant to bypass any nutrient deficiencies that may be present in the soil. This is particularly useful for plants that are growing in soil that is low in certain nutrients or that have a hard time absorbing nutrients from the soil due to pH or other issues.

Another important factor to consider is the timing of the foliar feeding. The best time to apply the solution is during the plant’s active growth phase when the stomata are open and the leaves can take in nutrients most efficiently. Additionally, it is important to avoid foliar feeding during the hottest part of the day, as the high temperatures can cause the leaves to burn and damage the plant.

Foliar feeding is a highly effective method of providing nutrients to cannabis plants. Not only does it increase nutrient uptake and improve plant health, but it can also result in faster growth and higher yields. By taking the time to learn about the right nutrients to use, when to apply the solution, and how to avoid common mistakes, cannabis growers can maximize the benefits of this powerful feeding technique.

Benefits of Foliar Feeding for Cannabis Plants

Cannabis plants, like all other plants, require proper nutrients and care to grow and flourish. While traditional methods of soil feeding can be effective, foliar feeding is becoming an increasingly popular approach for cannabis growers around the world. The benefits of foliar feeding are numerous, and its ability to provide cannabis plants with the necessary nutrients and minerals they need to thrive is what sets it apart from other methods. In this section, we will delve into the various advantages that foliar feeding can provide for cannabis plants and how it can help produce a better yield.

Increased Nutrient Uptake

One of the biggest benefits of foliar feeding for cannabis plants is the increased nutrient uptake. When nutrients are applied directly to the leaves of the plant, they can be absorbed much more quickly and efficiently than if they were applied to the soil.

This is because:

This increased nutrient uptake can lead to:

• Increased growth rates
• Healthier, more vigorous plants
• Better resistance to stress and environmental factors

Foliar feeding can be a powerful tool for ensuring that your cannabis plants are getting the nutrients they need to grow and thrive. By delivering nutrients directly to the leaves, you can bypass soil-related issues and ensure that all parts of the plant are getting the nutrients they need to reach their full potential.

Faster Results

Foliar feeding is a great way to achieve faster results in the growth and development of cannabis plants. Here are some reasons why:

• Direct Absorption: When nutrients are sprayed onto the leaves, they are directly absorbed by the plant, without the need for root uptake. This means that the nutrients are available to the plant immediately, resulting in faster growth and development.
• Increased Energy: Foliar feeding provides the plant with an extra boost of energy, which translates into faster growth and development. The added energy helps the plant to produce more chlorophyll, which is essential for photosynthesis and growth.
• Bypassing Soil Issues: In some cases, soil may be lacking in certain nutrients, or there may be issues with pH levels or mineral imbalances. Foliar feeding provides a way to bypass these issues, as the nutrients are applied directly to the leaves, rather than having to navigate through the soil first.

It is important to note, however, that foliar feeding should not replace regular soil fertilization. Rather, it should be used as a supplement to help achieve faster results and address any nutrient deficiencies.

Improved Photosynthesis

One of the major benefits of foliar feeding for cannabis plants is improved photosynthesis. Photosynthesis is the process in which plants convert light energy into chemical energy, which they need for growth and development. The healthier a plant’s photosynthesis process is, the faster and healthier it will grow. Here are some ways in which foliar feeding can improve photosynthesis:

• Increased chlorophyll production: Chlorophyll is the pigment that gives plants their green color, and it is responsible for absorbing light energy for photosynthesis. Foliar feeding with nutrients such as nitrogen and magnesium can increase chlorophyll production, which can improve photosynthesis.
• Better carbon dioxide uptake: Carbon dioxide is another important component of photosynthesis. Foliar feeding can improve the plant’s ability to take in carbon dioxide by opening up stomata, which are the small pores on the surface of the leaves that allow gas exchange.
• Enhanced energy transfer: The energy captured during photosynthesis needs to be transferred to different parts of the plant to fuel growth and development. Foliar feeding with nutrients such as phosphorus and potassium can improve the transfer of energy within the plant, leading to faster growth and development.
• Reduced stress: Stressful conditions such as extreme temperatures or lack of nutrients can impact photosynthesis negatively. Foliar feeding can provide the plant with the necessary nutrients to fight stress and improve its ability to carry out photosynthesis.

By improving photosynthesis, foliar feeding can not only help the plant grow faster and healthier, but it can also lead to higher yields and better quality cannabis.

Reduced Risk of Pests and Diseases

Foliar feeding not only enhances the nutrient uptake of cannabis plants but also reduces the risk of pests and diseases. The reason behind this benefit is that foliar feeding provides essential nutrients directly to the leaves, making them stronger and healthier. As a result, the leaves become more resistant to pests and diseases, reducing the risk of infestations and infections.

Some nutrients that can help in reducing the risk of pests and diseases are:

Foliar feeding can also help in controlling and preventing pest and disease outbreaks. When plants are healthy and well-fed, they are better equipped to fight off pests and diseases. The nutrients provided through foliar feeding can create a hostile environment for pests and diseases, making it difficult for them to survive and reproduce.

Some pests and diseases that foliar feeding can help prevent are:

Foliar feeding not only enhances the growth and development of cannabis plants but also provides several benefits, such as reduced risk of pests and diseases. Using the right nutrients and following proper application techniques can greatly improve the plant’s ability to fight off potential threats.

When to Use Foliar Feeding

As a cannabis grower, one of the most important aspects of plant care is providing proper nutrition to ensure healthy growth and a bountiful harvest. While foliar feeding can be a powerful tool for boosting plant health, it is important to use it at the right times and in the right way. In this section, we will delve into when to use foliar feeding to maximize its benefits for your cannabis plants.

During Vegging Stage

The vegging stage of cannabis plants is crucial for their development, and foliar feeding can help support their growth during this phase. This stage occurs after the seedling phase and before the flowering stage. During this stage, the plant will focus on growing more foliage and developing a strong root system to support future growth.

One of the main benefits of foliar feeding during the vegging stage is that it can provide the plant with additional nutrients that may not be readily available in the soil. This can help the plant to grow faster and stronger.

Foliar feeding can help the plant recover from stress caused by environmental factors such as temperature fluctuations, inadequate lighting, or overwatering. The additional nutrients provided by foliar feeding can help the plant recover more quickly and resume healthy growth.

It is important to note that foliar feeding during the vegging stage should be done sparingly and not as a replacement for soil nutrients. It should be used as a supplement to support healthy growth and development. Overuse of foliar feeding can lead to nutrient burn or other issues that can harm the plant.

In summary, foliar feeding during the vegging stage can help cannabis plants grow faster, stronger, and recover from stress more efficiently. It should be used as a supplement to soil nutrients and used sparingly with caution to avoid any negative effects.

During Flowering Stage

When the cannabis plant enters the flowering stage, foliar feeding can help provide additional nutrients directly to the buds and flowers. This can lead to bigger, denser buds and an overall increase in yield. However, it’s important to choose the right nutrients and apply them correctly to avoid damaging the delicate flowers.

Choosing the Right Nutrients: During the flowering stage, the cannabis plant requires a different set of nutrients than during the vegetative stage. Look for fertilizers specifically formulated for the flowering stage, with a higher concentration of phosphorus and potassium. It’s also important to make sure the fertilizer has a low nitrogen content, as too much nitrogen can lead to slow bud growth and reduced potency.

Preparing the Solution: Mix the chosen fertilizer with water in the appropriate ratio according to the manufacturer’s instructions. It’s important to avoid over-diluting or over-concentrating the solution, as this can lead to nutrient deficiencies or plant burn.

Applying the Solution: Use a spray bottle to apply the nutrient solution directly onto the buds and flowers of the cannabis plant. Make sure to apply the solution evenly and avoid spraying too much, as excess moisture can lead to mold growth. It’s also important to avoid spraying in direct sunlight or during the hottest part of the day, as this can cause the solution to evaporate too quickly and damage the plant.

Precautions to Take: When foliar feeding during the flowering stage, it’s important to use caution to avoid damaging the delicate buds and flowers. Avoid spraying on the leaves, as this can block light and reduce photosynthesis. It’s also important to avoid spraying on the pistils, as this can reduce pollination and lead to reduced yields.

Common Mistakes to Avoid: Common mistakes include using the wrong type of fertilizer, over-spraying the plant, and spraying during the wrong time of day. It’s important to do your research and follow the manufacturer’s instructions carefully to avoid damaging your plants.

Foliar feeding during the flowering stage can provide additional nutrients directly to the buds and flowers of the cannabis plant, leading to bigger, denser buds and an overall increase in yield. However, it’s important to choose the right nutrients, apply them correctly, and use caution to avoid damaging the delicate flowers.

During Pest and Disease Outbreaks

During pest and disease outbreaks, foliar feeding can be a helpful tool in ensuring the health and survival of cannabis plants. Pests and diseases can weaken the plants, affecting their growth and yield, and foliar feeding can provide a boost in nutrients and support their immune system.

Here are some situations when foliar feeding during pest and disease outbreaks can be useful:

• The plants are showing signs of nutrient deficiencies due to pests or diseases affecting their root system.
• The plants are experiencing stress due to the pest or disease outbreak, reducing their ability to absorb nutrients from the soil.
• The pests have damaged the foliage, reducing the plant’s ability to photosynthesize and produce energy, leading to nutrient deficiencies.
• The plants are recovering from a previous outbreak, and their root system is still weakened, limiting their ability to absorb nutrients.

Benefits of foliar feeding during pest and disease outbreaks:

• Quickly addresses nutrient deficiencies: Since the foliar spray is applied directly to the leaves, it can bypass any issues that may be occuring in the soil and provide nutrients to the plant quickly.
• Strengthens the plant: By providing additional nutrients, the plant becomes stronger and better able to fight off pests and diseases.
• Boosts the plant’s immune system: A foliar feed can contain ingredients that promote the plant’s natural defense mechanisms, which can help prevent further damage from pests or diseases.
• Proactive prevention: Foliar feeding can also act as a preventative measure during a pest or disease outbreak. By providing the plant with additional nutrients, the plant is better equipped to fight off any future threats.

It is important to note that foliar feeding should not be the only method used to tackle pest and disease outbreaks. It should always be used in combination with other methods such as integrated pest management, plant hygiene protocols, and biological control methods. It is also important to identify and address the root cause of the outbreak, whether it be environmental or related to plant care.

Foliar feeding during pest and disease outbreaks can provide cannabis plants with a much-needed boost in nutrients and support their immune system during a challenging time.

How to Apply Foliar Feeding on Cannabis Plants

As you have learned about the benefits of foliar feeding for cannabis plants, it’s time to understand how to apply it effectively. Foliar feeding involves spraying nutrients directly onto the leaves of the plant, and there are specific techniques and precautions to follow to avoid damaging the plant. In this section, we’ll discuss the steps to follow when applying foliar feeding to your cannabis plants, including choosing the right nutrients, preparing the solution, applying the solution, and taking necessary precautions. Let’s delve into this process step by step.

Choosing the Right Nutrients

Choosing the right nutrients for foliar feeding is crucial for the growth and development of cannabis plants. It is important to choose nutrients that are specifically formulated for foliar feeding, as they are designed to be absorbed by the plants quickly and efficiently. It is important to choose nutrients that are appropriate for the stage of growth the plant is in.

Other nutrients such as iron, zinc, and manganese are also important for plant growth and development. It is essential to read the labels of the nutrients and ensure that they are suitable for foliar feeding. Overuse of nutrients can lead to plant burn and nutrient deficiencies, so it is important to follow the manufacturer’s instructions carefully.

It is important to choose high-quality nutrients that are free from harmful chemicals and contaminants. This can help to ensure that the plants receive the necessary nutrients without any negative side effects.

Preparing the Solution

Preparing the solution for foliar feeding is a crucial step in the process. It involves selecting the appropriate nutrients and diluting them to the correct strength to avoid burning the leaves. Here are the steps to prepare the solution for foliar feeding cannabis plants:

1. Choose the right nutrients: Using high-quality nutrients that are specifically formulated for foliar feeding is essential. The right nutrients can improve nutrient uptake and increase the overall health and yield of the plant. It’s important to read the label instructions and ensure that the nutrients contain the necessary macronutrients and micronutrients that the plant needs.

2. Dilute the solution: Once the nutrients have been selected, it’s time to dilute them to the correct strength. This step involves measuring and mixing the nutrients with water. It’s important to follow the manufacturer’s instructions precisely, as too much nutrient can burn the leaves, while too little may not provide enough nutrients for the plant.

3. Use clean water: Using clean water for foliar feeding is important to avoid contaminating the plant with harmful bacteria or chemicals. Always use distilled, dechlorinated, or filtered water when preparing the solution.

4. Use a spray bottle: A spray bottle is the best tool for applying the nutrient solution to the leaves. It allows for even distribution of the solution and prevents waste. Be sure to choose a spray bottle with a fine mist setting to avoid damaging the leaves.

5. Test the solution: Before applying the solution to the entire plant, it’s important to test a small area first. Spray a few leaves and wait 24-48 hours to observe any adverse reactions or burning. If the plant shows signs of stress, dilute the solution further and test again.

By following these steps and preparing the solution carefully, cannabis plants can receive the proper amount of nutrients necessary for optimal growth and health.

Applying the Solution

When it comes to applying the foliar feeding solution on cannabis plants, there are a few key factors to keep in mind. First and foremost, it’s important to make sure that your plants are dry before spraying them. Wet leaves can actually prevent the nutrients from being absorbed properly, so it’s best to wait until the foliage has dried completely.

Once you’re ready to apply the solution, there are several methods you can use. Here are some common techniques, along with their pros and cons:

No matter which method you choose, it’s important to apply the foliar feeding solution in a gentle, even manner. Don’t drench the plants, but rather apply a fine mist until the leaves are just slightly damp. Make sure to cover both the tops and undersides of the leaves for best results.

It’s also important to avoid spraying the solution during the hottest part of the day, as this can cause burning or other damage to the leaves. Instead, opt for early morning or late afternoon hours when the sun is less intense.

Once you’ve applied the foliar feeding solution, it’s best to wait a few hours before watering the plants. This will give the leaves time to absorb the nutrients before they are diluted by watering. It’s also a good idea to repeat the process every few weeks or so, depending on the health and growth of your plants.

Keep in mind that while foliar feeding can provide many benefits to cannabis plants, it should not be relied upon as the sole source of nutrients. Always make sure your plants are receiving proper care and nutrition through a complete nutrient program.

Precautions to Take

When applying foliar feeding on cannabis plants, it is important to take certain precautions to avoid damaging the leaves and reducing their ability to photosynthesize. Here are some of the precautions to keep in mind:

• Avoid applying foliar feeding during the hottest parts of the day: When the leaves are exposed to high temperatures, the nutrients in the solution can burn them and cause damage. Apply the solution early in the morning or late in the evening when the temperature is cooler.
• Avoid spraying on the flowers: Foliar feeding solution on the flowers can leave residue and affect the quality of the buds. Instead, focus on spraying the leaves directly.
• Avoid using tap water for the solution: Tap water can contain chlorine and other chemicals that can harm the plants. Use filtered or distilled water instead.
• Be gentle when spraying the leaves: Too much pressure can damage the leaves and reduce their ability to absorb the nutrients. Use a fine mist sprayer and spray gently.
• Test on a small area first: Before applying the foliar feeding solution to the entire plant, test it on a small area and wait for 24 hours to see how the plant reacts. If there are no negative effects, then it is safe to apply to the rest of the plant.
• Keep the foliar feeding solution at the right temperature: The solution should not be too hot or too cold, as extreme temperatures can harm the leaves. Keep the solution at room temperature before applying.
• Wear protective clothing: When handling the foliar feeding solution, wear protective clothing such as gloves and a mask to avoid skin irritation and inhalation of the solution.

By taking these precautions, you can ensure that the foliar feeding solution is applied safely and effectively, providing the maximum benefits to your cannabis plants.

Common Mistakes to Avoid when Foliar Feeding Cannabis Plants

While foliar feeding can be a great way to give your cannabis plants an extra boost, there are some common mistakes to avoid in order to ensure the best results. One mistake is applying too much solution, which can lead to nutrient burn and damage to the plant. It’s important to follow the instructions for dilution and application carefully.

Another mistake is applying foliar spray during the wrong time of day. The best time to apply foliar spray is during the early morning or late afternoon when the sun is not too strong. Applying foliar spray during the heat of the day can cause the solution to evaporate quickly and reduce its effectiveness.

Using the wrong nutrients is also a common mistake to avoid. It’s important to choose nutrients that are specifically designed for foliar feeding and are appropriate for the stage of growth your plant is in. Using the wrong nutrients can lead to nutrient deficiencies or toxicities that can harm the plant.

Not properly preparing the solution is another mistake to avoid. It’s important to mix the solution thoroughly and ensure that all ingredients are dissolved. Using unclean water or dirty equipment can also negatively impact the effectiveness of the solution.

Lastly, not taking proper precautions can also lead to mistakes. Wearing protective clothing, gloves, and eyewear is important when handling nutrients and applying foliar sprays. Failure to take these precautions can result in accidental exposure to chemicals, which can be harmful to both plants and humans.

By being aware of these common mistakes and taking the necessary precautions, you can successfully foliar feed your cannabis plants and enjoy the benefits it provides.

Conclusion

Overall, foliar feeding is a beneficial technique for cannabis growers to consider implementing in their cultivation practices. With its ability to speed up nutrient uptake, improve photosynthesis, and reduce the risk of pests and diseases, foliar feeding can help to produce stronger, healthier plants that yield better results.

However, as with any cultivation technique, it is important to use foliar feeding appropriately and carefully. This includes selecting the right nutrients, preparing the solution correctly, and applying it at the appropriate times and intervals.

It is also important for growers to be aware of common mistakes associated with foliar feeding, such as using too high of a concentration or applying too frequently, as these errors can have negative effects on plant health and growth.

Overall, with the proper use of foliar feeding, cannabis growers can enhance the quality and efficiency of their cultivation practices and produce healthier, more bountiful plants. By following the steps and precautions outlined in this guide, growers can feel confident in incorporating foliar feeding into their normal routine and reaping the benefits for their cannabis crops.

Frequently Asked Questions

What nutrients can be used for foliar feeding?

Various micronutrients can be used for foliar feeding, such as nitrogen, phosphorus, potassium, iron, calcium, and magnesium.

Can foliar feeding replace soil-based feeding?

No, foliar feeding should be used as a supplement to soil-based feeding and not a replacement.

What is the best time of day to apply foliar feeding?

The best time to apply foliar feeding is early in the morning or late in the afternoon when the leaves are not under direct sunlight.

Why is it important to use distilled water for foliar feeding?

Distilled water helps prevent clogging of plant pores and ensures that the nutrients are properly absorbed by the plant.

Can foliar feeding lead to nutrient burn?

Yes, overfeeding the plant through foliar feeding can lead to nutrient burn, so it’s important to follow recommended dosage and frequency.

Does foliar feeding work on all types of cannabis plants?

Yes, foliar feeding works on all types of cannabis plants regardless of the strain or growth stage.

Can foliar feeding improve the flavor of cannabis buds?

Yes, foliar feeding can improve the flavor and aroma of cannabis buds due to increased nutrient uptake and improved photosynthesis.

When should foliar feeding be avoided?

Foliar feeding should be avoided during the flowering stage when buds are forming as it can lead to nutrient build-up and affect taste and potency.

What is the ideal temperature range for foliar feeding?

The ideal temperature range for foliar feeding is between 20-25°C (68-77°F) to ensure that the nutrients are properly absorbed by the plant.

Can foliar feeding help prevent powdery mildew?

Yes, foliar feeding can help prevent powdery mildew by promoting healthy leaf growth and improving the plant’s immune system.

References

• How & When to Foliar Feed Cannabis Plants
• Cannabis cultivation – Wikipedia