Question about fertilizer

[butterfly_muse]

Morning, all!

I remember reading somewhere on this board not too long ago (it may have been an old thread - I spend a lot of time googling) that someone switches their fertilizer ratios at a certain time of year which signals to the plant that it's time to bloom? Or should?

I have been feeding my guys a fertilizer that is 30-10-10 because I read that plants potted in bark need more nitrogen...but I have also read that too much nitrogen in cattleyas keeps them from blooming...? Does this apply to other orchids? Is it even true?

If it is, what kind of fertilizer should I switch to so as to allow them to bloom, and when would I know when it's appropriate to do so? My cattleyas and one of my mini phals are in active growth right now - so is that when they need a switch? Or is it later when they're fixing to bloom? How do I even know when they are trying to grow blooms? (This is my first year with orchids, so)

Thanks!