I have Osmocote and Miracle grow Bloom boost--not to metion some Miracid, Orchid food and the MG houseplant food. The first 3 I use only outdoors, The last 2 indoors, (obviously).
I use them all depending on the occasion.--I am more concious of the feeding thing since I neglected to feed my amaryllis last year and all I have this year is "green"---my bad---

You are so very lucky to be able to keep those plants outdoors---I bet they are beautiful.--
I
had a schefflera--got it in 1979 for a wedding gift.---it was about 7-8 feet tall in Dec of 2004 when we moved. I had no place to keep it (or so I thought) so it did not survive the move---I am still sad about that---
I realize you know much more than I do on the subject and I appreciate your giving me the benefit of your knowledge.