This was from my buddy whos grow is pictured above and uses far red to extend flower times.
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On average Cannabis starts flowering outdoors at 14/10, indoors at 12/12. The reason for the difference is the presence of 730 nm light outdoors naturally. 730 nm light switches the plant from day to night,wake to sleep by flipping the phytochrome state. 730 nm lights have been available for indoor growing for years, I’ve been using it for around 6 years. Without 730 indoors it takes the plant 2 hours to transition the phytochrome state from day to night. 5 Minutes of 730 light after the main lights go out will flip the state so that you can run up to 14/10 indoors. I began using 730 to increase yield because of the extra energy the plant can take in with the longer schedule. Using 730 indoors as a trigger also seems to shorten flower by a week or more.
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