Marijuana plant leaves changing color near harvest. Good or bad?

You've keep your marijuana plant healthy throughout your entire grow but now you're near harvest and your plant's leaves are changing color. Is this a good thing or a bad thing?

Grateful Grower has 20 plants that are on week 9 of flower - day 57 to be exact. At this point, he's only giving his plants water and some molasses before the harvest. He's growing in 7-gallon pots and using coco coir as the growing medium. Temperature is at 73 degrees and humidity is at 55%. Everything sounds good but his plant's leaves are changing color from a healthy green to a yellow. Why? Is this good or bad? Watch the video below for the explanation.

Check out his video here:

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