Miniature Phalaenopsis Leaf with a black strip on edge
Hi everyone, I am new to growing orchids. I bought this miniature Phalaenopsis from Trader Joe's about two weeks ago. I realized that the edge of a top leaf slowly turns into black as shown in the picture. I have not water it until today and the roots seem to be healthy and green. Does anyone have an idea what is wrong with my plant and what should I do? Thanks!