New vandas - fertilizing tips

[Irisha99]

Hello, guys.
Saw these two beauties at a local Lowe’s and couldn’t resist buying them $35 a piece. They are both blooming. One is kind of starting to dry the blooms already but the other one is still going strong. I know normally you don’t fertilize blooming plants but it has a second spike. How do I ensure that it blooms?
I have another Vanda plant that I have been trying to rehabilitate from last year. It has a few short roots so it’s easy to water/fertilize it. But these two beauties have long roots. How do you guys manage them? Spray fertilizer on them? Any help/suggestions are appreciated. Thanks