Budding and Grafting Citrus and Avocados in the Home Garden
https://homeorchard.ucdavis.edu/8001.pdf
BUDDING
Budding is the standard method used to propagate citrus. Aside from being the eas- iest method, it allows a large number of plants to be propagated from a small amount of scion wood and is suitable for trees, rootstocks, or branches from 1â„4 to 1 inch (0.6 to 2.5 cm) in diameter.
Budwood should be taken only from high-producing, disease-free trees (see sidebar). The best citrus budwood is located just below the most recent flush of new growth; the best avocado budwood is located near the terminal end of shoots that have fully matured, leathery leaves.