How To Use Progressive Web App aka PWA On 420 Magazine Forum
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Resin is produced day and night. (autoflowering plants grown totally under 24 hours of light still have resin) This 48 darkness theory is a myth. I've even tried the old white widow 2 week darkness and saw nothing but yellowing plants due to non photo sysnthesis.
Now I will tell you that the best time to harvest is right before lights on. The plant is at it's most potent point with the least amount of starch in it. The more light it sees before harvest the more starch in the system.