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Welcome to the most extensive and up to date encyclopedia of cannabis cultivation

The 9 factors that determine cannabis growth are as follows:

• Light
• Water
• Nutrients
• Humidity + Temperature (Vapour pressure deficiency)
• Oxygen
• CO2
• Airflow
• Root temperature

Others factors include:

• Growing medium
• Plant training

These factors are all connected! Raising the temperature can decrease relative humidity, increasing light intensity will require more nutrients to support photosynthesis, poor soil pH can lead to nutrient lockout, etc. In most cases, other parameters must be adequately fulfilled in order to make full use of a given parameter. For example, a cultivar cannot make use of a powerful light if it lacks chlorophyll due to insufficient nutrient provisions.

The anatomy of cannabis

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