you can get your plant to turn purple by putting ice in the pot ,especially if it is outdoors and your ha ving colder nights.

purple weed is no stronger than green weed.
TheShastaCoMan Reviewed by TheShastaCoMan on . What temp turns a plant purple? I've been reading around the forums and I noticed something about when a plant gets too cold it goes into shock and starts to turn purple. And I was wondering at what low temperatures do plants start to do that? I really don't care about what color my weed is, as long as it gets me stoned I'm happy. But when people see purple weed they instantly think that its some super dank shiet, hopefully my weed will be dank regardless but it would also be cool to have a few purple plants :smokin: Rating: 5