Loads of light, moist, water and fert. But especialy the light and water did the job. Bought a special growlamp and hung it 6"es away from the plant and now the plant changed into a growing maniac
I found a scientific book about vanda's on google and read it (83 PAGES!!). I found out vandas don't care about daylenght. They care about light only that. The more sunlight they receive, the less of a certain hormone they produce which will eventually lead to flowering. If you keep hitting the plant with light you can expect spikes every two months.
Growing them in the dark also promotes flowering but the plant will grow in slowmotion.