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

The 9 factors that determine cannabis growth (and yield) are as follows: (in order of importance)

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

These factors are all connected! Raising the temperature can increase 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 chorophyll due to insufficient nutrient provisions.

Plant training

The anatomy of cannabis

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