Reblooming Vandas?

[Ari]

I have two Vandas. One I have rebloomed. I live in Minnesota.

I took them all outside this year but one day it was 50F and I had to take all my orchids in, especially the Vandas.

Does anyone know how you can tell whether a Vanda will bloom or not?

Come to think of it, it might be a good idea to put the smaller Vands in my orchidarium and take the Catteleya out.

I like to give my orchids as much as 3 or 4 years before I figure they are not going to bloom and I might want to send them to the compost.

Thanks for listening. This is my first post here.