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What are the Best Growing Conditions for Cannabis? Leave a comment

Growing cannabis requires work but can be a super fun experience with the right know-how. The most important thing is to ensure that your cannabis plants are grown in optimal conditions in order to achieve the best results. The environment in which the plants are grown plays a significant role in their growth and development, and it is essential to understand the best growing conditions for cannabis. In this article, we will explore in-depth the various factors that contribute to successful cannabis growth, including light, temperature, humidity, soil, nutrients, and other important considerations.


Light is a crucial factor in cannabis growth (that goes for all plants!), as it plays a key role in the plant’s ability to produce energy through photosynthesis. Cannabis plants require a specific amount of light in order to thrive, and indoor growers have to replicate the natural light cycle in their grow room. This can be achieved through the use of artificial lighting, such as high-quality LED grow lights that provide full-spectrum light to the plants. Learn all about indoor set ups from our grow guide! 

There are two types of HID lamps used in cannabis cultivation, metal halide (MH) and high-pressure sodium (HPS). MH lamps emit a bluish-white light that is ideal for the vegetative stage, while HPS lamps emit a reddish-orange light that is best for the flowering stage. Some growers also use LED grow lights, which are energy-efficient and produce less heat.

The light should be positioned above the plants and kept on for at least 12 hours a day, with 18 hours being the optimal range during the vegetative stage. During the flowering stage, the plants require 12 hours of light and 12 hours of darkness.

Outdoor growers should choose a discreet location that receives at least six hours of direct sunlight per day. The amount of sunlight the plants receive affects the quality and yield of the buds. In areas where there are long periods of cloudy weather, growers may need to supplement with artificial lighting to ensure the plants receive enough light.

Light is one of the most critical factors in growing cannabis. Plants need light to photosynthesize and produce energy for growth. The amount and quality of light that cannabis plants receive can affect their growth and yield. For indoor growers, high-intensity discharge (HID) lamps are the most common type of lighting used. These lamps produce a lot of heat, so they need to be positioned at a certain distance from the plants to prevent burning.


Temperature is another important factor in cannabis growth. The plants thrive in temperatures between 20 and 25 degrees Celsius during the day and between 15.5 and 21 degrees Celsius at night. Temperatures that are too high can cause the plants to wilt and become stressed, while temperatures that are too low can slow growth and lead to nutrient deficiencies.

During the vegetative stage, it is recommended to maintain a temperature of around 21 degrees Fahrenheit during the day and 18 degrees Celsius at night. During the flowering stage, the temperature should be around 18 degrees Celsius during the day and 12.7 degrees Celsius at night. Growers should use a thermometer to monitor the temperature of the grow room and make adjustments as needed.

indoor cannabis leaf in pink light


Cannabis plants require a humid environment in order to grow, but too much humidity can lead to mould and mildew. Indoor growers should aim for a humidity level between 40% and 60%, while outdoor growers should pay attention to the local climate and adjust accordingly.

During the vegetative stage, higher humidity levels of around 60% are recommended, while lower humidity levels of around 40% are ideal during the flowering stage. Growers should use a hygrometer to monitor the humidity levels in the grow room and adjust as needed.


The soil in which cannabis plants are grown is critical to their success. The soil should be well-draining, but also retain enough moisture to keep the plants healthy. It should also be rich in nutrients, including nitrogen, phosphorus, and potassium. Adding compost or other organic matter to the soil can help improve its quality. Learn all about soil here.

When selecting soil, it is important to choose a high-quality organic soil that is specifically designed for cannabis growth. Many growers also choose to amend their soil with additional nutrients and amendments, such as worm castings, bat guano, and bone meal.

hands holding soil in garden


Cannabis plants require a variety of nutrients in order to grow and produce high-quality buds. The three primary macronutrients are nitrogen, phosphorus, and potassium. Micronutrients such as calcium, magnesium, and iron are also essential. Many growers choose to use organic fertilizers, which can improve soil health. Micronutrients such as calcium, magnesium, and iron are also essential. A popular choice is the use of organic fertilisers, which can improve soil health and provide a steady source of nutrients to the plants.

In addition to the factors mentioned above, it is important to maintain a clean and well-ventilated growing area in order to prevent pests and diseases from taking hold. Regularly inspecting the plants for signs of stress or disease can also help catch any problems early on.

Watering is also an important factor to consider when growing cannabis. Overwatering can lead to root rot and other fungal diseases, while underwatering can cause the plant to dry out. The amount of water required depends on the size of the plant, the type of soil or growing medium, and the environmental conditions.

It is important to water cannabis plants regularly but not too often. The soil should be allowed to dry out slightly before watering again to prevent overwatering.

Air Circulation

Air circulation is essential for cannabis cultivation. Good air circulation helps to regulate temperature and humidity, prevents mould and mildew growth, and strengthens the plant’s stems. Fans can be used to circulate air around the plants and prevent stagnant air from building up.

In conclusion, growing cannabis successfully requires careful attention to detail, particularly when it comes to providing the right growing conditions. By ensuring that the plants receive the proper amount of light, temperature, humidity, soil, and nutrients, growers can produce high-quality buds that are both potent and flavourful. In other words, take care of your plants, and they will take care of you!

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