Newbi and need help with Dendrobium
I went to Lowe's and happened to wonder into their garden section by 'accident'. I found this beautiful Dendrobium Orchid still blooming and had healty green leaves. After two weeks at home I notice some of the leaves started to turn yellow on one of the plants and one leaf had two black spots on it. My questions is: 1) Why are the leaves turning yellow? 2)What are the black spots and what should I do about it? 3) How to care for this plant. I have the care instructions but they seem pretty basic and what I've read on dendrobiums is that they have a wide range of varieties and some have different likes and dislikes. Thank you for your wisedom and time.
pics are on the link and look at orchid1 for the plant
Here is a link that might be useful: Pics