JMurphy97 & ssgrock, plants turn black for any number of reasons: transplanting shock, wrong soil media type, and old age being the three most common in my experience. The first just takes time 'til the plant adjusts to its new home. It can be lessend somewhat by not changing its conditions too fast. If it comes with a cover, don't remove the cover and stick it outside in bright sun immediately. Do it in stages so the plant has time to adapt slowly to the changes. The second can usually be corrected by changing the media to sphagnum peat moss (either straight or mixed with sand or perlite), LFS (Long Fiber Sphagnum peat moss) or any other media lacking nutrients. Coconut fiber (coir) has been used by many. The third is part of the natural cycle of the plant and should not be a problem. If the black withered parts bother you, they can be trimmed off. Most people, if they trim their plants, just cut off the blackend portion of the leaf and leave the rest to continue photosynthesizing for the plant.
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