This discoloration happens because of the plant variety. Do not be concerned, because the leaf is healthy.
A droopy leaf usually means a dry plant. You should feel your orchid leaves and pay attention for any signs of shriveling or softness. The best way to remedy this situation is by removing your orchid from the ceramic and running it under a facet with warm water. Slowly turn the plant and allow the water to completely drain before returning the plant to the ceramic. The roots should begin to change color from a light grey to a dark green. It is ok to let your orchid go a little dry, but do not wait too long because the flowers may start to fall!
Yellowing of the leaves can be a result of one of two things: the shriveling of an old leaf or a symptom of a fungus called fusarium. If the yellowing stops after one leaf, then the plant is just losing an old leaf and there is no danger to your plant. If the yellowing continues to multiple leaves, and the base of your plant begins to turn yellow or black, like the image seen here, then your plant is infected with fusarium. We recommend throwing away your plant immediately. It is very difficult to cure fusarium. Be very careful when selecting your orchids upon purchasing. Choose only orchids with 4 or more leaves and make sure all the leaves are healthy green.
Yellow Leaf Spots
If your plant’s leaves develop yellow leaf spots with brown centers, like this image, then your plant is infected with a bacteria called pseudomona. We recommend that you cut the leaf, in half, with disinfected scissors 2 inches beneath the infected spot. This may stop the spread of the pseudomona. We do not recommend using any chemical to cure the plant as pseudomona is very difficult to cure. Be sure to keep your orchid in sanitary conditions and try not to handle your orchid frequently to help pre