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Defects in cannabis plants

Defects in cannabis plants: An in-depth look at the category

Cannabis plant care requires precise knowledge and attention, especially when it comes to recognizing and correcting deficiencies. A basic understanding of plant development and the importance of key nutrients is essential. This category takes an in-depth look at various deficiencies that can affect your cannabis plant. The focus is on understanding these deficiencies and how to treat them effectively.

What you'll find in this category

In this category "Deficiencies in cannabis plants " category, you'll learn why it's important to keep your plant's older and youngest leaves green. An incorrect pH value can disrupt nutrient absorption and lead to deficiency symptoms such as brown spots or burnt tips. Here we explain what important minerals such as zinc, molybdenum and magnesium mean.

List of deficiencies

This category deals with various nutrient deficiencies and shows how you can recognize them:

Boron (B)

Bormangel

A lack of boron often manifests itself in a curvature of the leaf tips and an unusual leaf shape. Boron is important for cell wall strength and plant development.

Preventive measuresCorrective measures
  • Ensure that your plants always have sufficient moisture.
  • Prevent blockage of nutrient uptake by avoiding over-fertilization.
  • Make sure that the humidity never drops below 25%.
  • Choose a soil that allows good drainage and aeration.
  • Enrich your compost with generous amounts of apples, bananas, broccoli and chickpeas.
  • Clean the growing medium and keep the pH in the optimum range.
  • Mix a teaspoon of boric acid with 4 liters of water and apply this solution to affected plants.

Calcium (Ca)

Calcium Mangel

Calcium deficiency leads to stunted roots and young leaves. The leaves may also show necrotic spots. Calcium is crucial for cell wall strength and signal transmission in the plant.

Preventive measuresCorrective measures
  • Incorporate dolomite lime or garden lime into the growing medium.
  • Aim for a pH of 6.2 for optimal calcium uptake.
  • Enrich your organic compost with plenty of eggshells.
  • Invest in a worm farm, as worm compost is rich in calcium and other nutrients.
  • Use Cal-Mag supplements as a supplement.
  • Adjust the pH of your soil to around 6.2.
  • Dissolve a teaspoon of hydrated lime in 4 liters of water and water your plants with it.

Iron (Fe)

Eisen Mangel

Without sufficient iron, new leaves turn yellow and show growth disorders. Iron is essential for chlorophyll production and therefore for photosynthesis.

Preventive measuresCorrective measures
  • Promote the iron uptake of your plants by adding mycorrhizae to the soil, which support the transport of iron into the root system.
  • Check the pH value of the soil to identify and avoid a possible nutrient blockage.
  • Enrich your compost with chicken manure, kitchen waste and seaweed to increase iron availability.
  • Adjust the ideal soil pH to optimize iron uptake.
  • Flush out the growing medium and then add a special iron supplement.
  • Use small amounts of nitrogen fertilizer to lower the pH and thus facilitate iron uptake.

Copper (Cu)

Kupfer Mangel

Copper deficiencyis rare, but can lead to dark green leaves and growth inhibition. Copper is an important component of many enzymes.

Preventive measuresCorrective measures
  • Avoid excessive soil alkalization, as high pH values can impair copper uptake.
  • Enrich your compost with copper-rich materials such as seaweed and animal manures.
  • Maintain a good balance of nutrients in the soil to promote copper uptake.
  • If necessary, lower the pH of the soil to improve the availability of copper.
  • Avoid excessive watering as this can lead to dilution of nutrients in the soil.
  • Apply copper-containing fertilizers or foliar sprays carefully to increase copper levels.

Potassium (K)

Kalium Mangel

A lack of potassium leads to leaf edge yellowing and ultimately leaf death. Potassium is crucial for water regulation and the activation of enzymes.

Preventive measuresCorrective measures
  • Do not over-fertilize your plants to avoid salt accumulation and the resulting interruption of potassium uptake.
  • Enrich your compost with hardwood ash and kelp meal to increase the potassium content.
  • Avoid overwatering as this can affect potassium uptake.
  • Flush the growing medium to remove salt buildup and nutrient blockages.
  • Check and adjust the pH of the soil to prevent or correct nutrient blockages.
  • Add chicken manure to the soil to increase potassium levels.
  • Use organic seaweed as a foliar spray to ensure a direct supply of potassium.

Magnesium (Mg)

Magnesium Mangel

Without enough magnesium, the leaves will yellow between the veins and chlorosis will occur. Magnesium is a central component of the chlorophyll molecule.

Preventive measuresCorrective measures
  • Enrich the growing medium with dolomite lime to increase the magnesium content.
  • Use compost rich in manure to improve magnesium availability.
  • Maintain a balanced pH in the soil to optimize magnesium uptake.
  • If the pH is unbalanced, flush the medium with water that has a pH of 6.0.
  • Use Epsom salt as a source of magnesium. Mix 1-2 teaspoons of Epsom salt with about 4 liters of water and water your plants with it.

Manganese (Mn)

Mangan Mangel

Manganese deficiency is shown by chlorosis in young leaves. Manganese is important for photosynthesis and nitrogen metabolism.

Preventive measuresCorrective measures
  • Regularly measure the pH value of your soil and keep it in the optimum range to ensure the availability of manganese.
  • Enrich your compost with manganese-rich foods such as pineapples, tomatoes, cranberries and carrots.
  • Rinse the pots to remove excess salts and nutrient blockages.
  • Cut back affected growth that does not show recovery.
  • Use an algae foliar spray to apply nutrients directly to the canopy.

Molybdenum (Mo)

Molybdän Mangel

A lack of molybdenum can lead to a general weakening of the plant. Molybdenum plays an important role in nitrogen fixation and is essential for plant health.

Preventive measuresCorrective measures
  • Maintain soil pH between 6.0 and 6.5 for optimal molybdenum availability.
  • Start with high-quality, living compost to ensure a healthy start for your plants.
  • Occasionally add beans, peas, grains, and raw nuts to your compost pile to enrich it with Molybdenum.
  • Flush the soil and adjust pH levels if necessary to correct nutrient imbalances.
  • Spray affected plants with a seaweed foliar spray to provide Molybdenum directly to the leaves.
  • Water your plants with worm casting compost tea to provide a rich source of Molybdenum.

Nitrogen (N)

Stickstoff Mangel

Nitrogen deficiency is shown by yellow older leaves, as nitrogen is important for leaf green and plant growth.

Preventive measuresCorrective measures
  • Maintain pH in the range of 6.0 to 6.5 to optimize nitrogen uptake.
  • Use a plant soil mixture that is rich in nutrients.
  • Start composting to create a nutrient-rich medium in the long term.
  • Add mycorrhizae to the soil, which are associated with nitrogen-oxidizing bacteria, to improve nitrogen levels.
  • Use organic fertilizers such as fish meal, manure, alfalfa or feather meal, which are rich in nitrogen.
  • Adjust soil pH as needed.
  • Apply compost tea as a foliar spray to provide a quick supply of nitrogen.
  • Increase the nitrogen content of your compost by adding kitchen scraps, fresh clippings and grass clippings.

Phosphorus (P)

Phosphor Mangel

Phosphorus deficiency often manifests itself in darker green leaves and a delay in growth. Phosphorus is important for energy transfer and flower formation.

Preventive measuresCorrective measures
  • Choose soils with a high proportion of organic matter for improved phosphorus availability.
  • Use well-aerated soils to increase the absorption rate of phosphorus.
  • Use mycorrhizal fungi in the soil to promote the conversion of insoluble phosphates into available molecules.
  • Enrich your compost with additional manure to increase the phosphorus content.
  • Adjust the pH of the soil to the higher range to facilitate phosphorus absorption.
  • Add worm humus and fish meal to the soil to increase the phosphorus content.
  • Use organic fertilizers with high phosphate content.
  • Reduce watering and only water when the top 3cm of soil is dry to avoid overwatering.
  • Place plants in warmer areas or use covers to retain more heat, as phosphorus uptake is more difficult at temperatures below 15°.

Sulphur (S)

Schwefel Mangel

Sulphur deficiency leads to a general yellowing of the leaves. Sulphur is important for protein synthesis and the formation of enzymes.

Preventive measuresCorrective measures
  • Enrich your compost heap with manure to increase the sulphur content.
  • Use fungi and bacteria to release sulphur in the soil. Use techniques such as no-till and add mycorrhizae to potted plants.
  • Use Epsom salt, which is rich in sulphur. Mix 1-2 teaspoons of Epsom salt with about 4 liters of water and water your plants with this solution.
  • Adjust the pH value of the soil if necessary to optimize sulphur uptake.

Zinc (Zn)

Zink Mangel

Zinc deficiency can lead to deformation of the leaves and impaired growth. Zinc is important for protein production and plant development.

Preventive measuresCorrective measures
  • Keep the soil pH balanced to avoid zinc deficiencies caused by overly alkaline conditions.
  • Increase the zinc content in your compost by adding pumpkin and zucchini residues.
  • Boost zinc uptake by adding beneficial mushrooms to your growing medium.
  • Reduce an overly alkaline soil pH to an ideal range to make zinc more available.
  • Avoid overwatering as this can impair zinc uptake.
  • Use fish or seaweed leaf sprays to quickly increase zinc levels in plants.

These deficiencies can manifest themselves through changes in the leaves of the plant. Knowing how to correct a deficiency is essential for any cannabis grower.

Importance of leaf health

The health of the older leaves as well as the youngest leaves of your cannabis plant plays a central role. They should always remain green to ensure optimal photosynthesis. An incorrect pH value in the soil or nutrient solution can significantly disrupt the absorption of important nutrients. As a result, mobile nutrients such as nitrogen (N), phosphorus (P) and potassium (K) are absorbed in smaller quantities, leading to deficiencies.

The role of micronutrients

Zinc, molybdenum and magnesium are important for plant growth. Although these elements are required in smaller quantities, they are essential for many physiological processes.

Recognizing deficiencies

Deficiencies manifest themselves in symptoms such as brown spots, burnt tips or chlorosis in the leaves of the plant. Nitrogen deficiency often manifests itself in yellow older leaves. Nitrogen is a mobile nutrient and is transported from older to younger leaves when there is a deficiency.

Correcting deficiencies

Knowing how to correct a deficiency is of great importance to any cannabis grower. It requires an understanding of which nutrients are needed in what quantities and how to adjust the cannabis plant's environment accordingly to optimize the supply.

This category provides you with comprehensive information and practical tips on recognizing and treating nutrient deficiencies in cannabis plants. It is an essential resource for anyone who wants to keep their cannabis plant healthy and productive. With this knowledge, you can solve cannabis growing problems and keep your plants growing successfully.

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