what fertilizers does everyone use and at which stage ?

thought id ask for others thoughts on fertilizers used on amaryllis plantings..
i have 5 pots various large bulbs..i have them in good potting mix..plants seem to thrive in it..
my own compost,perlite,sand,worm castings,coco coir...
i water with worm castings tea to start when i pot up.. then when leaves shoot out..i water again..
then i give mix of worm castings tea with fertilizer 15:15:15 fertilizer..i get really nice flowers..
does anyone else use a higher P fertilizer?
when flowers are spent..i use same fertilizer and lots of light.. they do well..then
i plant them out in summer in bright area.. sometimes they flower again.. mostly i want them
to build up strength in bulb.. for winter flowering..
hope to glean from others experiences..
thanks

I use orchid food. 1/4 strength at every watering.

That's probably something I should be doing.