At what age does a Vanda Bloom?

[Junebug]

Got a Vanda that I've been nurturing for about 4 years. It was given to me as a cutting from a mature large sprawling plant. The first year or two it was slow to grow. The last 2 years it has really taken off and is sending out numerous roots, but no blooms. Have increased lighting from E to SE. Just read an article stating Vandas don't mature until approx. 5 yrs. old. Maybe I've being too anxious. Would appreciate any input from experienced Vanda growers. Thank you.