Temperature day/night cycles for cannabis: 22–26°C during the day, 18–22°C at night with 4–8°C difference for healthy growth and optimised internodes.
Optimum temperatures: day 22-26°C, night 18-22°C. A temperature difference of 4-8°C promotes internode stretching. Too high temperatures: stress, reduced trichome production. Too low: slow growth, nutrient uptake problems. Automate heating/cooling, ensure even distribution in the room.
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