Quote Originally Posted by Faddenator
I completely agree... Most strains will turn purple if the temps are low in the night cycle during flowering. It's a defense mechanism of the plant to protect from the cold. I hear anywhere below 70 degrees F will make it happen.

However, People will love the way your bud looks... it's a common misconception that purple = amazing.
My plant turned reddish for a few days when the temp dropped to 70 due to a cold streak here, but returned back to green pretty quickly. The cold also seemed to bring out a more fruity smell that also faded when the temp went back to normal...These plants are truly strange