I wanted to share Ken's tropical potting mix "recipe." (That's the DrDawg that we've bought plumerias and orchids from in the past.) I started using it a couple years ago for my plumerias, but it should work for most tropicals. I use pine bark mini nuggets, whatever compost looks good and has a reasonable price, coarse perlite (similar in size to rock salt), and Osmocote.
2 parts composted cow manure (something like Black Kow)
1 part cypress mulch (clean mulch)
1 part super-coarse perlite
For every 5 gal. of potting media, add 1/2 cup of a balanced, 4-6 mo. slow release fertilizer
