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Recommendations for fertilizers in cannabis cultivation

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Growing cannabis is both an art and a science, and soil quality is a crucial part of it. Fertilizers and soil amendments are essential components to keep the soil nutrient-rich and healthy for cannabis growth. This article offers practical recommendations for fertilizers and soil amendments to provide the best growing conditions for your cannabis plants.

Understanding the nutritional needs of cannabis

Cannabis plants require a variety of macro and micro nutrients to thrive. The three main nutrients are nitrogen (N), phosphorus (P) and potassium (K), which are often specified in fertilizers in the NPK ratio. In the vegetative phase, cannabis plants require more nitrogen, while in the flowering phase, phosphorus and potassium are more important.

Organic vs. Synthetic Fertilizers

Organic fertilizers: These are made from natural materials such as compost, manure, bone meal or blood meal. They not only improve the nutrient content, but also the soil structure and promote biological activity in the soil. Organic fertilizers release their nutrients more slowly, which prevents over-fertilization and ensures a long-lasting supply of nutrients.

Synthetic fertilizers: Chemically produced fertilizers provide a quick supply of nutrients, but if used improperly, they can damage soil structure and lead to salt deposits. They should be used carefully and according to the manufacturer's instructions.

Cannabis cultivation: soil improvements for optimal growth

pH adjustment: The optimal pH for growing cannabis is between 6.0 and 7.0. Use lime to neutralize acidic soils or sulfur to acidify alkaline soils.

Improve drainage: Perlite, sand or vermiculite can be added to loamy soils to improve drainage and increase root aeration.

Increase water and nutrient retention: Coconut fiber, peat moss or compost can be added to sandy soils to improve moisture and nutrient retention capacity.

Increasing soil fertility: Organic materials such as compost, worm castings or green plant fertilizers can increase fertility and biological activity.

Timing and application of fertilizers

Fertilization should be adapted to the growth phase of the cannabis plants. During the vegetative phase, the focus should be on nitrogen, while during the flowering phase, phosphorus and potassium should be present in higher proportions. Always follow the fertilizer manufacturer's instructions and avoid over-fertilization to avoid nutrient burn and other negative effects.

Regular soil tests

Regular soil testing is important to monitor the nutrient levels and pH of the soil. Based on the test results, you can determine which nutrients are lacking and make adjustments accordingly.

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