(Last updated November 16, 2020)
Here is the best overall resource on grafting avocados that I’m aware of. Written by some of the most experienced people in the world, and specific to California conditions, it is a publication called “Propagating Avocados” from the University of California.
Avocadosource.com makes “Propagating Avocados” freely available online HERE.
You might also like to read my post: “Where to get avocado scion wood.”
All of my Yard Posts are listed HERE