Vandopsis parishii X Mariottiana Seedling

[DendrobiumFan]

Hi Everyone!

I am not a complete novice, but I've never grown Vandas as I do not have a greenhouse. All my orchids grow throughout my home and overall, enjoy it. This year was a very tough winter and my poor orchids were not at their happiest. Late last summer, I was given a Vanda seedling by someone at a show I attended. It wasn't doing much, but seemed to hang in OK during the winter. It came in a two inch plastic pot with just a few pieces of medium bark. The seedling only has three small leaves. Today I noticed a couple of black spots on it. Might be fungal. It doesn't have much root. Only a couple of short nubs. In general, can anyone give me good instructions on how to grow a Vanda seedling. How often show I water? Should it go dry in between or not? How high a light level? This one has been under a plant grow light. Anything would be appreciated.