Hmm...some strains have a genetic predisposition to produce purple foliage, but black? That doesn't sound like genetics. On the other hand, colder temperatures can cause some abnormalities in purple strains...like causing the plant to turn a darker shade of purple. Maybe this is what's happening to yours.

Do you know what strain it is? Also, if you could provide pictures, it would certainly help others to ascertain what's happening.
Mr. Clandestine Reviewed by Mr. Clandestine on . Outdoor plant, leaves turning purple / black Hi Folks, I'm a new grower and I have an outdoor female who's in full bloom. Over the past few weeks I've noticed the fan leaves slowly starting to turn purple and black. First it was a few, now it's 3/4 of the plant. The buds, however, are still nice and fluffy and green. The nights right now are getting to be around 10 degrees Celsius (50 degrees Fahrenheit). Should I be alarmed by this? I've got about another week to go. Thanks, El Fantistico :smokin: Rating: 5