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Revitalize Your Grow Room: 12 Key Points in a Cannabis Deficiency Chart You Must Know

Welcome to visit this comprehensive guide about cannabis nutrition. Growing healthy cannabis plants is no small feat, as it requires a deep understanding of the role and balance of various nutrients. Furthermore, it's not just about which nutrients are essential, but also the pivotal part that pH levels play in nutrient absorption.

We will also uncover the intricacies of mobile and immobile nutrients, a distinction that could make a significant difference in your cannabis cultivation. This guide features a comprehensive "cannabis deficiency chart," averting, and managing shortfalls of vital nutrients such as nitrogen, phosphorus, potassium, calcium, magnesium, and others.

What is Cannabis Deficiency?

Even if the plants are receiving a reasonably balanced diet, the absence of a single crucial nutrient can have significant consequences, negatively affecting both yield and quality.

These deficiencies can manifest themselves in numerous ways, including leaf yellowing (chlorosis), brown dead spots on leaves (necrosis), stunted growth, or other abnormalities. Understanding the cannabis deficiency chart can significantly aid in correctly identifying and remedying these problems.

The cannabis deficiency chart is a visual guide that assists growers in identifying nutrient deficiencies in their cannabis plants. Each nutrient deficiency triggers distinctive symptoms in cannabis plants, which are noted in the chart. By looking at the plant's symptoms and matching them to what is in the defect chart, growers can accurately identify specific defects and take appropriate corrective action.

pc-altaqua cannabis deficiency chart-What is Cannabis Deficiency
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Cannabis Nutrition and pH

Having understood what cannabis deficiency means, let's delve into another significant aspect of cannabis cultivation, the interplay of cannabis nutrition and pH. The health and productivity of your cannabis plants are hugely influenced by their nutritional intake and the pH level of the environment they grow in.

Nutrient Dynamics and pH Levels: The Core of Cannabis Growth

Nutrient dynamics and pH levels play a central role in cannabis growth, influencing the plant's ability to absorb and utilize essential nutrients. Understanding the interplay between nutrient dynamics and pH levels is key to promoting successful cannabis cultivation.


Optimal Absorption pH Range

Nitrogen (N)


Phosphorus (P)


Potassium (K)


Iron (Fe)


Zinc (Zn)


Manganese (Mn)


Different nutrients are absorbed most efficiently at varying pH levels.

In conclusion, understanding the interplay between cannabis nutrients and pH serves as a reminder to growers to consistently monitor the pH of the cannabis growing medium to ensure healthy plant growth. In the upcoming sections, we will delve deeper into the essential macro nutrients and micro nutrients that cannabis requires.

Understanding Macronutrients and Micronutrients in Cannabis

Like any other plant, cannabis relies on specific nutrients for its growth and development. These nutrients can be classified into two main categories: macronutrients and micronutrients. Understanding their importance, roles, and recognizing deficiency symptoms is essential for successful cannabis cultivation.

Exploring the Essential Macronutrients for Cannabis

Macronutrients are nutrients that cannabis plants need in large amounts for their growth and development.

pc-altaqua cannabis deficiency chart-Essential Macronutrients for Cannabis

Nitrogen plays a vital role in the development of chlorophyll and amino acids in cannabis, essentially fueling its growth and foliage. Phosphorus is critical for energy transfer and storage, while Potassium contributes to the overall plant strength and resistance to diseases.

Deficiencies in these macronutrients can manifest in various signs, which will be visually depicted in the Cannabis Deficiency Chart presented in the following section, aiding growers in timely identification and remediation.



Nitrogen (N)

Crucial for the development of amino acids and chlorophyll, which supports the plant's growth and foliage.

Phosphorous (P)

Critical for energy storage and transfer.

Potassium (K)

Contributes to the overall plant strength and disease resistance.

Calcium (Ca)

Involved in cell division and growth.

Magnesium (Mg)

Central to chlorophyll production, and therefore photosynthesis.

Sulfur (S)

Important for the production of vitamins, amino acids, and proteins.

Delving into the Vital Role of Micronutrients

In addition to macronutrients, micronutrients are equally important, although they are required in smaller quantities. Iron (Fe), Manganese (Mn), Zinc (Zn), Copper (Cu), Molybdenum (Mo), and Boron (B) are essential micronutrients that contribute to different aspects of the plant's life cycle.

For instance, Iron helps in chlorophyll production and oxygen transport, while Manganese aids in the metabolism of Nitrogen. Each micronutrient plays a unique role, and their deficiency can cause distinct symptoms, all of which are well documented in the cannabis deficiency chart.



Iron (Fe)

Essential for chlorophyll production and oxygen transport.

Manganese (Mn)

Facilitates the metabolism of Nitrogen.

Zinc (Zn)

Involved in the production of growth hormones.

Copper (Cu)

Aids in photosynthesis and reproductive processes.

Molybdenum (Mo)

Assists in the processing of Nitrogen.

Boron (B)

Involved in cell division and growth.

Having understood the macro and micro nutrients, it's essential to delve deeper into the world of cannabis nutrition and examine the concept of mobile and immobile nutrients.

pc-altaqua cannabis deficiency chart-Essential Micronutrients for Cannabis

Shedding Light on Mobile and Immobile Nutrients

Nutrients can also be classified based on their mobility within the plant, into mobile and immobile nutrients. A firm grasp on these concepts, coupled with knowledge of macro and micronutrients, can help to accurately diagnose and correct nutrient deficiencies in cannabis plants.

Decoding the Intricacies of Mobile Nutrients in Cannabis

Mobile nutrients, as the name suggests, can move within the cannabis plant to areas where they are most needed. Mobile nutrients often become evident in the older leaves of the plant.

Unearthing the Significance of Immobile Nutrients

On the other hand, immobile nutrients are unable to move within the plant once they have been absorbed. Immobile nutrient deficiencies often manifest themselves in the young leaves of cannabis plants

In conclusion, mobile and immobile nutrients is indispensable for cultivating cannabis plants that are healthy and highly productive.

To illustrate, let's consider Nitrogen, a mobile macronutrient. When it's in short supply, older leaves may start to yellow. In contrast, Calcium, an immobile macronutrient, when deficient, can trigger abnormalities in new growth, like distorted leaves or suppressed root development.

Likewise, micronutrients, despite their necessity in smaller quantities, hold a level of importance that's just as high. A deficiency in Iron might lead to yellowing between the leaf veins, while a Zinc deficiency could cause reduced leaf size and a distinct leaf discoloration.

Next, let's get familiar with the cannabis deficiency chart. By familiarizing yourself with the symptoms of nutrient deficiencies using the cannabis nutrient deficiency chart, you will be better equipped to identify potential issues and make necessary adjustments to your cultivation practices in a timely manner.

The Comprehensive Cannabis Deficiency Chart

When it comes to understanding and addressing nutrient deficiencies in cannabis cultivation, the comprehensive cannabis deficiency chart becomes an invaluable tool. By identifying the specific symptoms and causes, growers can take proactive measures to prevent and treat deficiencies effectively.

Nitrogen Deficiency in Cannabis

Nitrogen deficiency is a common challenge that growers face during the cultivation process.

Identifying Symptoms of Nitrogen Deficiency

Understanding nutrient deficiencies and their symptoms is integral to successful cannabis cultivation. Consulting a cannabis deficiency chart can greatly assist in this endeavor. For instance, nitrogen deficiency, a common issue, first manifests as a paleness in the leaves, which can eventually progress to yellowing, curling, and falling off, starting from the base of the plant. This yellowing can gradually ascend up the plant, and in severe cases, leaf browning can occur. The flowering phase may appear to accelerate, but with a compromised yield and reduced bud sites.

Causes of Nitrogen Deficiency

Several factors can contribute to nitrogen deficiency in cannabis. One common cause is insufficient nitrogen levels in the growing medium, such as soil or hydroponic solution.Such shortages can stem from subpar soil, insufficient fertilization, or too much leaching. In addition, overwatering or inappropriate pH levels can impede the roots' capacity to absorb nitrogen, thereby leading to deficiency symptoms.

Preventing and Treating Nitrogen Deficiency

Prevention is key to avoiding nitrogen deficiency in cannabis. We can implement balanced nutrient management programs. This includes providing a nutrient-rich growing medium, using nitrogen-rich fertilizers in appropriate amounts, and monitoring pH levels regularly. It is also necessary to use proper watering methods and proper drainage to prevent waterlogging conditions that hinder nitrogen absorption.

If nitrogen deficiency does occur, timely treatment is necessary. To remedy this, you could add nitrogen-rich fertilizers to the soil, such as organic compost or nitrogen-focused fertilizers. It's crucial, however, to heed the manufacturer's instructions and sidestep over-fertilization, as an excess of nitrogen can trigger other complications. Regular checks of nutrient levels and timely adjustments to fertilization routines can help uphold optimal nitrogen levels during the plant's growth phases.

pc-altaqua cannabis deficiency chart-Nitrogen Deficiency of Cannabis

Phosphorus Deficiency in Cannabis

Moreover, when it comes to the health of cannabis plants, it is crucial to identify the symptoms of phosphorus deficiency.

Identifying Symptoms of Phosphorus Deficiency

Phosphorus deficiency in cannabis plants can manifest in several distinct ways. This deficiency often presents as dry leaves with brown discolored areas, or perhaps red or purple spots, particularly on the petioles or leaf stems. The leaves might subsequently develop a dark blue or green tint. If this deficiency is not addressed, it can significantly slow the vertical and horizontal growth of the cannabis plant. The leaves might display dark, almost black, spots, and may curl, fall off, or even exhibit a metallic purple or dark bronze hue.

Causes of Phosphorus Deficiency

Several factors can contribute to phosphorus deficiency in cannabis cultivation. One common cause is inadequate phosphorus levels in the growing medium, such as soil or hydroponic solution. In some instances, poor-quality soil, inadequate fertilization, or unsuitable pH levels affecting nutrient availability can result in a deficiency. Overly alkaline conditions in the growing medium can also thwart phosphorus absorption.

Preventing and Treating Phosphorus Deficiency

Combatting phosphorus deficiency involves using a growing medium rich in phosphorus. For a more effective growing environment, consider using an aerated grow container such as an airpot, which promotes superior soil oxygenation levels. Incorporating well-rotted manure into your compost can also aid in enhancing the phosphorus levels. In addition, using beneficial mycorrhizal fungi can improve overall soil health and assist in converting less soluble phosphates into forms that are more readily absorbable and utilizable by your cannabis plant.

Implementing a comprehensive nutrient management plan is essential, incorporating phosphorus-rich fertilizers in appropriate amounts. Regular soil or nutrient solution testing helps monitor phosphorus levels and enables timely adjustments. Additionally, maintaining the correct pH range, typically slightly acidic, facilitates optimal phosphorus availability to the plants.

Potassium Deficiency in Cannabis

Potassium is one of the major nutrients vital for the overall health and successful growth of cannabis plants. Phosphorus plays a key role in processes such as photosynthesis, nutrient absorption, water regulation, and the creation of robust and healthy plant tissues.

Identifying Symptoms of Potassium Deficiency

IThe most common symptoms often manifest as discoloration of leaf edges, yellowing, or necrosis (dead spots) that often begins on older, lower leaves before spreading upwards. Additionally, you may notice stunted growth, weak stems, and an overall diminished plant vigor.

Causes of Potassium Deficiency

Understanding the causes of potassium deficiency is as important as identifying its symptoms. Often, it's not that the soil is devoid of potassium but that the plant can't absorb it. This problem can arise due to issues like pH imbalance, excessive salts in the soil, or overuse of other nutrients like calcium and magnesium, which rival potassium for absorption.

Preventing and Treating Potassium Deficiency

The prevention and treatment of potassium deficiency should be a top priority for any dedicated cannabis grower. Regularly referring to your Cannabis Deficiency Chart, you can plan a proactive strategy to prevent these issues from arising in the first place.

Staving off potassium deficiency begins with a balanced nutrient feeding plan and close monitoring of pH levels. This is because cannabis plants absorb potassium best at slightly acidic to neutral pH levels (roughly 6.0-7.0 in soil and 5.5-6.5 in hydroponic systems).

When it comes to treatment, the key lies in replenishing the potassium levels in your growing medium. This balance can be achieved by utilizing a water-soluble potassium supplement or a balanced, high-quality N-P-K fertilizer.

Calcium Deficiency in Cannabis

Calcium, much like potassium, is a major nutrient necessary for the healthy growth of cannabis. It is required for cell wall development and aiding the plant's stress response mechanism. A calcium deficiency can lead to serious health issues and diminished yields.

Identifying Symptoms of Calcium Deficiency

Symptoms usually appear on new growth and include distorted leaf tips, brown spots on leaves, and weak stems and roots. Leaves may curl or show a crinkly appearance.

Causes of Calcium Deficiency

Calcium deficiency in a plant usually stems from the plant's inability to absorb calcium effectively. This can be due to factors like incorrect pH levels, over-irrigation, or damage to the roots. Ideal absorption of calcium occurs at a pH of 6.2-7.0 in soil and 6.2-6.5 in hydroponic systems.

Preventing and Treating Calcium Deficiency

Preventing and treating calcium deficiency involves regular monitoring of the plant's growth and the growing environment. Keep a balanced nutrient schedule and ensure optimal pH levels for best nutrient absorption.

If a calcium deficiency is detected, it can be rectified with calcium additives or a high-grade calcium-magnesium (Cal-Mag) supplement. As with potassium deficiency treatment, introduce changes gradually and monitor plant response.

Magnesium Deficiency in Cannabis

Magnesium, being a part of the chlorophyll molecule, significantly influences plant photosynthesis. A deficiency in magnesium can greatly limit the plant's capability to generate energy from light, resulting in diminished growth, health, and yield.

Identifying Symptoms of Magnesium Deficiency

When a cannabis plant is deficient in magnesium, the first symptoms typically appear on the lower, older leaves. These symptoms often manifest as yellowing leaves with green veins - a phenomenon known as interveinal chlorosis. As the deficiency progresses, these yellow areas can turn into necrotic, or dead, spots.

Causes of Magnesium Deficiency

Causes of magnesium deficiency can include an incorrect pH level, an excess of competing nutrients like potassium and calcium, and overly damp or cold root zone conditions.

Preventing and Treating Magnesium Deficiency

Preventing and treating magnesium deficiency requires a combination of careful monitoring, using your cannabis deficiency chart, and proactive cultivation practices. Preventive measures include keeping the pH level optimal (6.0-7.0 in soil, 6.0-6.5 in hydroponics) and ensuring a well-balanced nutrient feeding schedule.

When treating an existing magnesium deficiency, apply a magnesium-containing supplement, such as Epsom salt, or a balanced N-P-K fertilizer with added magnesium. This should be done gradually to prevent plant shock and further stress.

Sulfur Deficiency in Cannabis

Sulfur, a less talked about but equally important nutrient, contributes to essential functions like chlorophyll production and root development.

Identifying Symptoms of Sulfur Deficiency

The symptoms of sulfur deficiency often mimic nitrogen deficiency, beginning with a yellowing of young leaves. As the deficiency progresses, the leaves may become more uniformly yellow or light green.

Causes of Sulfur Deficiency

An imbalance of soil pH, overly wet soil conditions, or an excess of competing nutrients can inhibit sulfur absorption.

Preventing and Treating Sulfur Deficiency

By referring to a cannabis deficiency chart and monitoring your plant's health regularly, you can prevent or address sulfur deficiency effectively.

If a sulfur deficiency has been identified, treatment involves supplying the plant with a sulfur-containing supplement or a balanced fertilizer.

Iron Deficiency in Cannabis

Iron in cannabis growth can promote chlorophyll production and energy creation.

Identifying Symptoms of Iron Deficiency

The symptoms often begin with yellowing of young leaves while the veins remain green. This condition is known as interveinal chlorosis.

Causes of Iron Deficiency

A high soil pH, waterlogged soil, or high levels of competing nutrients can inhibit iron absorption.

Preventing and Treating Iron Deficiency

If iron deficiency is detected, it can be treated with an iron supplement or a complete micronutrient fertilizer.

Zinc Deficiency in Cannabis

Zinc is a crucial micronutrient for cannabis plants, aiding in processes like growth hormone production and enzyme creation.

Identifying Symptoms of Zinc Deficiency

Symptoms of zinc deficiency often start as irregular leaf growth or deformed leaves.

Causes of Zinc Deficiency

Zinc deficiency in cannabis plants is typically caused by factors that inhibit nutrient absorption, such as high pH levels or an excess of competing nutrients, rather than a lack of zinc in the soil.

Preventing and Treating Zinc Deficiency

If a zinc deficiency is detected, it can be managed by using a zinc supplement or a balanced micronutrient fertilizer.

pc-altaqua cannabis deficiency chart-Zinc Deficiency of Cannabis

Manganese Deficiency in Cannabis

Manganese, a vital trace element, contributes to enzyme activity, photosynthesis, and chlorophyll production.

Identifying Symptoms of Manganese Deficiency

Symptoms often begin with interveinal chlorosis, a yellowing of leaves while the veins remain green. Over time, these yellow spots can become necrotic and eventually cause leaf death.

Causes of Manganese Deficiency

A shortage of manganese is not typically due to insufficient manganese in the soil but more often due to conditions that limit the plant's ability to absorb this micronutrient. Conditions like imbalanced soil pH, too much iron, or water-saturated soil can result in a manganese deficiency.

Preventing and Treating Manganese Deficiency

If a manganese deficiency is detected, it can be treated with a manganese supplement or a balanced micronutrient fertilizer.

Copper Deficiency in Cannabis

Copper is another important micronutrient for cannabis plants, involved in enzyme production and plant metabolism.

Identifying Symptoms of Copper Deficiency

Symptoms often start with darkening of the leaves, curling, and growth deformation.

Causes of Copper Deficiency

Factors such as incorrect soil pH, excess of competing nutrients, or overwatering can lead to a copper deficiency.

Preventing and Treating Copper Deficiency

A copper deficiency can be managed with a copper supplement or a balanced micronutrient fertilizer.

Molybdenum Deficiency in Cannabis

Molybdenum, although a trace requirement for cannabis growth, plays an important role in the nitrogen cycle of cannabis plants.

Identifying Symptoms of Molybdenum Deficiency

Symptoms often start as yellowing of the middle leaves, leading to interveinal chlorosis. As the deficiency progresses, the affected leaves might show unique symptoms like twisted leaf tips, commonly known as "the claw".

Causes of Molybdenum Deficiency

Usual culprits include an off-optimal pH level or an excess of other nutrients in the soil that compete for absorption.

Preventing and Treating Molybdenum Deficiency

If a deficiency is noticed, treatment can include supplementing the plant with a fertilizer containing molybdenum.

Boron Deficiency in Cannabis

Boron is an essential micronutrient for cannabis plants, playing a significant role in cell wall formation and the stabilization of molecules for plant growth and development.

Identifying Symptoms of Boron Deficiency

The symptoms often start with abnormal or stunted growth, particularly in the growing tips or new leaves.

Causes of Boron Deficiency

Boron deficiency in cannabis plants is more often due to factors inhibiting nutrient absorption like non-optimal pH levels, inadequate soil moisture, or too many competing nutrients rather than a lack of boron in the soil.

Preventing and Treating Boron Deficiency

If a boron deficiency is noticed, it can be remedied by providing the plant with a boron supplement.


Symptoms of Deficiency

Causes of Deficiency

Prevention & Treatment


Paleness in leaves, yellowing, curling, falling off, leaf browning in severe cases, accelerated flowering phase with reduced yield.

Insufficient nitrogen levels in the growing medium, overwatering, improper pH levels.

Balanced nutrient management programs, nitrogen-rich fertilizers, monitoring pH levels, proper watering methods.


Dry leaves with brown discolored areas or red/purple spots, dark blue or green tinted leaves, slow growth, dark spots, curling or falling off of leaves.

Inadequate phosphorus levels in the growing medium, improper pH levels, excessive alkalinity.

Use a phosphorus-rich growing medium, use beneficial mycorrhizal fungi, phosphorus-rich fertilizers, maintain correct pH.


Discoloration of leaf edges, yellowing or necrosis, stunted growth, weak stems, diminished plant vigor.

Plant's inability to absorb potassium due to factors like pH imbalance, excessive salts in the soil, overuse of other nutrients.

Balanced nutrient feeding schedule, monitored pH level, potassium supplements or high-quality N-P-K fertilizer.


Distorted leaf tips, brown spots on leaves, weak stems and roots, curled or crinkled leaves.

Plant's inability to absorb calcium due to factors such as improper pH levels, overwatering, or root damage.

Balanced nutrient schedule, optimal pH levels, calcium supplements or high-quality Cal-Mag supplement.


Yellowing leaves with green veins (interveinal chlorosis), necrotic or dead spots on leaves.

Incorrect pH level, an excess of competing nutrients, overly damp or cold root zone conditions.

Maintaining optimal pH level, balanced nutrient feed schedule, magnesium-containing supplement like Epsom salt.


Yellowing of young leaves, uniformly yellow or light green leaves in severe cases.

Imbalance of soil pH, overly wet soil conditions, or an excess of competing nutrients.

Regular monitoring of plant's health, sulfur-containing supplement or a balanced fertilizer.


Yellowing of young leaves while the veins remain green (interveinal chlorosis).

High soil pH, waterlogged soil, high levels of competing nutrients.

Iron supplement or a complete micronutrient fertilizer.


Irregular leaf growth or deformed leaves.

High pH levels or an excess of competing nutrients, rather than a lack of zinc in the soil.

Zinc-containing supplement or a balanced micronutrient fertilizer.


Yellowing of leaves while the veins remain green (interveinal chlorosis), yellow spots can become necrotic and eventually cause leaf death.

Imbalanced soil pH, excessive iron, or waterlogged soil conditions.

Manganese supplement or a balanced micronutrient fertilizer.


Darkening of the leaves, curling, and growth deformation.

Incorrect soil pH, excess of competing nutrients, overwatering.

Copper-containing supplement or a balanced micronutrient fertilizer.


Yellowing of the middle leaves, interveinal chlorosis, twisted leaf tips ("the claw").

Non-optimal pH level or an overabundance of competing nutrients in the soil.

Molybdenum-containing fertilizer.


Abnormal or stunted growth, particularly in the growing tips or new leaves.

Non-optimal pH levels, low soil moisture, overabundance of competing nutrients.

Boron-containing fertilizer.

Conclusion: Upgrading Cannabis Cultivation with the Cannabis Deficiency Chart

As we bring our exploration of the cannabis deficiency chart to a close, we've armed ourselves with powerful knowledge about the critical role of nutrients in cannabis cultivation. The intricate relationship between macro and micro nutrients, as well as pH, plays a pivotal role in fostering a flourishing cannabis growth environment. The cannabis deficiency chart serves as a crucial guide, helping us not only identify but also rectify potential nutritional deficiencies affecting our plants.

The importance of such a chart is underscored by the various nutrient deficiencies we've delved into, from nitrogen to potassium. By recognizing the symptoms and understanding the causes, we're able to take informed steps to treat and prevent these deficiencies, ensuring our plants stay healthy and robust.

The true value of the cannabis deficiency chart lies in its practical application. As we continually monitor our plants and make necessary adjustments, we evolve from simply reacting to problems to proactively creating an optimal growing environment.

If you want to learn about cannabis cultivation, feel free to visit our blog page.


1.What is a cannabis deficiency chart?

A cannabis deficiency chart is a guide that helps growers identify nutrient deficiencies in their cannabis plants. It presents distinctive symptoms associated with specific nutrient deficiencies, allowing growers to accurately diagnose and take corrective action.

2.How do I use a cannabis deficiency chart?

To use a cannabis deficiency chart, you need to observe the symptoms exhibited by your cannabis plants. By comparing these symptoms with the information presented in the chart, you can identify the specific nutrient deficiency affecting your plants. Once identified, you can take appropriate measures to address the deficiency and restore plant health.

3.How can I prevent and treat nitrogen deficiency in cannabis plants?

To prevent nitrogen deficiency in cannabis plants, it is important to implement balanced nutrient management practices. This includes using a nutrient-rich growing medium, providing nitrogen-rich fertilizers in appropriate amounts, and regularly monitoring pH levels. Additionally, proper watering methods and adequate drainage should be employed to prevent waterlogging conditions. If nitrogen deficiency occurs, corrective measures may involve adjusting nutrient levels, pH balance, and watering practices to ensure optimal nitrogen absorption by the plants.

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