Many Plants are Photoperiodic

December 28, 2018

The length of time you leave your lights on is just as important as the type and intensity of light you provide. Many plants are photoperiodic, meaning they require different durations of light and darkness to shift into different phases of growth or development, such as producing flower buds or forming bulbs.

Lettuce, herbs, and other plants growing together under full-spectrum fluorescent lamps.
PC: Leslie F. Halleck

Most plants require a minimum of 10 hours of light each day for active growth. While your plant might survive with less, it may go into a dormant state if you leave it at that photoperiod for an extended time.

Gardening Under Lights Book

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