"Whatever ever happened to a simple bag of fertilizer."

Nothing :-) Other than the fact that fertilizer manufacturers figured out they could quadruple their profits if they formulated all manner of plant specific fertilizers and convinced homeowners their plants would not grow unless they purchased the "right" one. Bollocks!!

Any all-purpose tree and shrub fertilizer will work. But wait until the tree becomes established before applying (if planting now, wait until next spring). And it is always a good idea to have a soil test done first to see if any fertilizer is even needed.....often it is not, especially if planted in a fertilized lawn.

i would not fert a new transplant already stressed by planting.. for at least a few months... if not the first year ...

have you ever had a soil test to determine what if anything is lacking in your soil ... thats good place to start when thinking about what need be added ....

with the caveat that i never gardened in FL ....

but i would still let the roots settle in before i start such

what you note above.. is all marketing mumbo jumbo ... any cheap balanced fert is probably good enough ... and unless you have barren soil.. all the other stuff is usually already there.. in good enough quantities

and in fact.. if you fert your lawn ... soon enough most plants will put their roots under the grass.. and get what little they need ... and agin .. i not big on palms .. so i dont really know their root systems ...

bottom line... try not to love it to death.. just plant it.. water it properly ... and 99% of the time you dont need much of anything else .. its not like palms are rare or hard to grow in FL .. i do know that much ...

keep in mind.. plants are not children.. they dont need to be fed.. clothed.. nor educated .... just some water until they get established ...

also.. BTW ... usually the smaller the transplant.. the easier they take planting and getting established.... if you have any problems.. it might be due to the huge plant you are starting with ... but lets hope.. you dont end up with problems.... [they are also easier to get home.. and hoik around the yard...]

ken