Dendrobium kingianum. What is low nitrogen fertilizer?

[sunfire]

I have a Dendrobium kingianum that I received a couple years ago as a small cane/keiki. In that time I have certainly abused it but instead of dying, it produced several keikis. I am more seriously focused on caring for this plant and it’s offshoots now and have read that it needs a “low nitrogen” fertilizer to improve growth and reduce keiki formation.

So my question is: what exactly qualifies as a low N fertilizer? I mixed up a “K-lyte“ knockoff using the calculator at firstrays.com (approx 13-2-2-14-3) and have been using this at 25-50 ppm on my phals in SH. Does 25ppm N count as “low N” or does the N need to be a lower percentage in the fertilizer, like a “Bloom Booster” fertilizer with either high P or high K compared to N?

Also, theoretical question regarding the K-lyte formula in SH. If flushing the pot “refreshes” the chemistry, is going with such a low P and K formula necessary? Any excess P and K “should” be washed out each time. Just pondering… thanks!