i always water my plants every morning and since i am growing outdoors i also water them
in the afternoon (or when i still have the energy to do so). I fertilize mine with fish/guano/
seaweed extract when i remember it which is about 1x a month, on some of my orchids i
put a osmocote wrap in a piece of pantyhose. I find that the secret with Vandas is lots of
water, high humidity and lots of sun (strap leaf can take less otherwise they burn their leaves).
Hope this helps.