Everybody would be in good shape plant wise if they did 2 simple things.
1. Join a local club. I joined the Treasure Coast Rare Fruit club.
2. Find a local knowledgeable supplier of plants and fertilizer. And follow their recommends on what to plant and what to feed it.
This means not Home Despot or Lowes.
Years of wasted money and effort will be saved.
The biggest problem then will be how to eat, store, give away all the bounty.