Why is my tradescantia nanouk dying? You ask. Here are a couple reasons why. Brown leaf tips are lack of humidity or direct sun too long. Yellow leaf could be a bacteria issue but it’s probably just too much moisture or the plant soil is not draining. This can lead to root rot from sitting in water for too long. If this is the case just allow the soil to dry out and stop watering it. At this point you may consider fresh soil and repotting into a well draining soil with plenty of perlite mixed in.