Nutrient deficiencies and excesses in Cannabis

The cannabis nutrient deficiencies and excesses section is designed to help growers diagnose, understand, and correct nutritional problems that affect the health and yield of their plants. You’ll find practical guides, nutrient charts, and visual symptom references to maintain balanced, thriving cannabis crops. Here you’ll learn about:
  • How to identify common deficiencies (yellowing leaves, brown spots, slow growth).
  • Recognising nutrient excesses (burnt tips, dark or twisted leaves).
  • The role of macronutrients (nitrogen, phosphorus, potassium) and micronutrients (calcium, magnesium, iron, zinc).
  • How to control pH and EC levels to avoid nutrient lockout.
  • Step-by-step solutions to revive stressed or overfed plants.
  • Preventive measures to keep your plants balanced and healthy throughout the grow.
The goal of this category is to provide a clear and reliable resource for understanding cannabis nutrition, helping you correct deficiencies early and prevent future issues that can affect plant health and yield.

Deficiencies and excesses in Cannabis

Deficiencies and excesses in Cannabis

Nutrient imbalance in cannabis plants? In this post, we will focus on the macro and micro-nutrients necessary for the development of cannabis plants. These elements are available in the nutrients, so the chosen type of fertilizer and its correct use will lead us to a crop without deficiencies or excesses, thanks to properly planned and balanced feeding. Different factors must be considered, so we'll try to explain them simply so that all growers can dispel any doubts they may have about the nutrition of their cannabis plants.

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Silicon in cannabis cultivation

Silicon in cannabis cultivation

Cannabis needs a good number of macro and micronutrients to be able to develop without any kind of nutritional limitation. Nitrogen, phosphorus and potassium (NPK) are probably the best known, present in most cannabis fertiliser formulas for both the vegetative or growth phase and the flowering phase, along with others such as iron, sulphur, boron and molybdenum, to mention just a few. However, there is one very special element for the development of plants, and one that until a few years ago did not receive the attention it deserves. We are talking about silicon (Si), a nutrient that, although it is not necessary for the plant to grow and bear fruit properly, will greatly increase its defences against sources of stress such as pests, diseases or drought, while reinforcing the cell walls of plant tissues, strengthening their structure and favouring processes such as photosynthesis. Today we will talk about this interesting nutrient, see how to use it and examine its main characteristics.

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Fertilising Autoflowering Cannabis Plants

Fertilising Autoflowering Cannabis Plants

Autoflowering cannabis plants are great for several reasons. They have fast growth cycles (generally less than 11 weeks from seed), they do not depend on light schedules to trigger flowering, they have a high resistance to mould and pests... but, above all, due to their short life cycle and size, autos don't require large inputs of nutritional resources, meaning that growers can save money as they won't need to feed plants for as long to get great results. Aside from their rapid development, autoflowers have a strong and resilient nature, so they aren't too fussy about the quality of the medium they grow in and can still do well with minimal nutrients.

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Deficiency and excess of Iron in cannabis plants

Deficiency and excess of Iron in cannabis plants

In the scenario of nutrition in agriculture, where each element plays a crucial role in the life of plants, iron is an essential actor in the development and vitality of plants, playing a fundamental role in processes as important as photosynthesis, the formation of chlorophyll, or resistance to environmental stress. Today we invite you to discover the relationship between this element and your plants, as well as what you should do if they show any symptoms of a deficiency or excess of this important micronutrient.

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Deficiency and excess of magnesium in cannabis plants

Deficiency and excess of magnesium in cannabis plants

In the world of cannabis cultivation, each of the macro and micronutrients plays a crucial role in the healthy development of plants. In this sense, magnesium is a fundamental nutrient for harvest success, playing vital roles in key processes such as photosynthesis, chlorophyll formation, and nutrient absorption. In this article, we invite you to explore the importance of magnesium in cannabis cultivation, from its basic functions to signs of deficiency and excess, as well as best practices to ensure an adequate supply of this essential nutrient.

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Deficiency and excess of Phosphorus in Cannabis plants

Deficiency and excess of Phosphorus in Cannabis plants

In the field of agriculture, phosphorus emerges as an essential element that triggers a series of fundamental processes for the correct flowering of plants. From the development of extensive and effective root systems to the activation of vital metabolic processes, in this article, we invite you to explore the importance of phosphorus for your plants. Discover how this element, present in most flowering fertilizers but also many root stimulators, plays an important role in both the growth and flowering phases of plants, and how its strategic management can mark the difference in the quality and yield of crops.

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Deficiency and excess of Potassium in cannabis plants

Deficiency and excess of Potassium in cannabis plants

In the complex cocktail of essential elements for correct plant development, potassium stands out as a vital director that orchestrates numerous fundamental processes in plant cultivation. In today's article, we are going to see the main characteristics of potassium, exploring its crucial role in strengthening cellular structures, regulating water balance, and enhancing resistance to environmental factors. In addition, we will also see the main symptoms of a deficiency or excess of this element, known for its impact on the health and vigor of plants, and which plays a transcendental role in numerous plant vital processes.

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Deficiency and excess of Calcium in cannabis plants

Deficiency and excess of Calcium in cannabis plants

Growing cannabis is an art and science in constant evolution, where every detail counts to obtain healthy and vigorous plants, as well as abundant harvests. Plant nutrition is a key aspect of proper development, with calcium playing a crucial role in the development and health of crops. From the formation of cellular structure to disease resistance, calcium is an essential component in the arsenal of nutrients that growers must provide their plants to achieve quality harvests. In this article, we will thoroughly explore the role of calcium in growing marijuana, looking at its main functions, signs of deficiency and excess, as well as best practices to ensure an optimal supply of this vital nutrient.

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Micronutrients and Marijuana plants

Micronutrients and Marijuana plants

If you are a cannabis grower, you will know that every detail counts for healthy plants and abundant harvests. Among the many factors that influence plant development, micronutrients play an essential but often underestimated role; However, these small but powerful substances, which include minerals such as boron, zinc, sulfur, and manganese, are essential for numerous metabolic processes and vital functions of cannabis plants. In this article, we will explore the importance of these nutrients and their functions in the crop, the symptoms of deficiency and excess, as well as best practices to ensure that the supply of these elements is optimal and balanced, ensuring that everything will run smoothly. And, as you will see, micronutrients can make the difference between a mediocre crop and an extraordinary one!

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Deficiencies and excesses of nitrogen

Deficiencies and excesses of nitrogen

In the world of agriculture and plant growing, nitrogen is an essential element that plays an important role in the development and health of plants. Today we invite you to discover the complexities and benefits of nitrogen in the growing process, the different types of nitrogen that can be found in fertilizers, its impact on plant growth, and other fundamental aspects that make it an essential element for crop success. Without a doubt, nitrogen is one of the most important elements in cannabis cultivation, which promotes healthy and vigorous growth and which, of course, cannot be missing from any balanced diet for plants. We tell you everything below!

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About this Cannabis Blog

This is the official blog of Alchimia Grow Shop. This blog is intended exclusively for the use of adults over the age of 18 years.

To buy equipment for growing cannabis at home you can consult our catalogue of cannabis seeds, grow shop and paraphernalia


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