Phalaenopsis: Black spot on leaf
First, let me say that I have been enjoying reading many of the informative threads on this site. Thanks for all of the valuable information. Now for my first post. One of my phals has a black spot on just one of its leaves. This developed more than a year ago now and does not seem to effect the overall health of the plant. Many new roots have developed, a new leaf has grown over the summer, a second leaf is developing now and a new spike is beginning. Also, I just cut the old spike down to one node and I am seeing swelling from that node and it may send out new growth.
My question: what is the cause of the black spot and should I cut that leaf off the plant or leave it alone?
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