my outdoor Willie Nelson has turned purple on one side in the last few days, my friend's Willie Nelson is largely purple, but he lives a thousand feet higher than I do, cooler there by a few degrees ... it has only gotten down to about 48 at night here ... when purpling, the plants Ive seen changed color, but didn't display any signs of 'shock' ... regardless, it seems to have little effect on potency ... I haven't smoked any 'crippling' purple bud yet ... :jointsmile: