Views: 3 Author: Site Editor Publish Time: 2025-04-23 Origin: Site
Why Indoor Marijuana Growing Needs Constant Temperature and Humidity Air Conditioning
Temperature control
Cannabis has different temperature requirements for different growth stages:
Seedling stage: 20-25°C
Growth phase (nutrient phase): 22-28°C (daytime) / 18-22°C (nighttime)
Flowering: 20-26°C (high temperatures reduce bud quality)
Excessive temperature fluctuations may result in stunted growth or pests and diseases.
Humidity control
Seedling stage: 65-70% relative humidity (RH)
Growing period: 40-70% (needs to be reduced gradually to prevent mold)
Flowering stage: 40-50% (high humidity is prone to gray mold)
Too high humidity can lead to mold growth, too low affects transpiration.
CO₂ supplementation aid
In a closed environment, air conditioning needs to be used in conjunction with a CO₂ generator (optimal concentration: 1200-1500 ppm). Plants can utilize CO₂ more efficiently at high temperatures (28-30°C).
