Same deal here with this orchid

[LauraZ5]

This plant was purchased at the same time. The blooms on this are beginning to die from the bottom up.

Where should I trim this once the blooms are spent, if at all?

 

[herenorthere]

That looks like a Brassia or a hybrid with a lot of Brassia in it. But I don't know them and I could be very wrong.

I'd let it finish blooming and would then cut the spike back and repot it. I repot all new orchids because I believe most mixes are at or beyond the end of their useful life when orchids are sold. It probably isn't always necessary, but it's what I do.

 

[LauraZ5]

Okiedokie... This plant is Brassia 'Rising Star' which is Brs. 'Rex' x Brs. vetrucosa.  You certainly hit that ID of it being a Brassia on the head!  Thanks!  

It's been repotted.  I'll cut back the spike after it finishes blooming.