I have a question. I noticed that with some of my vanda orchids the roots begin to grow and look very healthy, then all of a sudden the tip starts to get a black ring around it and then it just seems to dry up or rot away, only at the same tip area. Anyone knows what causes this? I am becoming a bit concerned, since a new plant which I purchased earlier this year and which I was looking forward to doing so well with has started with this trend.
Help please:
:confused