Hello there! I am new here and would like to ask some tips regarding how to make my Vanda Orchids bloom. I have bought 5 Vandas at a local store here in the Philippines about 3 years ago, all have flowers at that time.

I have them mounted on a tree and they are receiving enough morning sun from 7am to 12nn. I water them every other day considering the type of climate we have here in the Philippines. I regularly fertilize them, weekly, with 15-30-15. My problem is, they have not produced flowers for 2 and half years now that is why I changed the fertilizer I'm using to 9-45-15.

Any tips? thanks.