How Many Hours a Day of Light Do Marijuana Plants Grown Indoors Need?

New to marijuana growing. How long should I turn the light on?

Germination: 5 to 10 days, 18 hours of light and 6 hours of darkness.

Seedling: 2 to 3 weeks, 8 hours of light and 6 hours of darkness.

Vegetative: 3 to 16 weeks, 18 hours of light and 6 hours of darkness.

Flowering: 8 to 11 weeks, 12 hours of light and 12 hours of darkness.

MORE: How’s the 24/7 Light Cycle for Auto-flowering Marijuana?

What Others Are Asking

Read Detailed Advice From Blog Articles

Scroll to Top