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How many hours of light do cannabis plants need?
Seedling/Veg: 18 hours on, 6 hours off (18/6). Flower (photoperiods): 12 on, 12 off (12/12). Autoflowers: 18/6 or 20/4 throughout entire grow — they flower automatically regardless of light schedule.
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3 Comments
Grower5mo ago
Bookmarking this for reference. Super helpful for beginners.
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Experienced5mo ago
Went through this exact scenario. Fixed it by adjusting watering schedule and it bounced back in 3 days.
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Seedling5mo ago
I'd add: don't overthink it. Cannabis is resilient. Start simple and learn as you go.
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