Greenhouse Light Deprivation Systems

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Greenhouse growers pull blackout covers to force a twelve hour dark period, which lets them flower a long sativa early enough to finish before autumn arrives. Automated systems handle the timing, though manual tarps work fine at small scale. Practical setups and scheduling for extended flowering genetics are explained at https://hazesativaseeds.com. Sealing edges properly matters most, because a few minutes of light through a gap will confuse the plant.

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