Companion planting is basically growing plants that work together to encourage healthy plant life and growth. These relationships become important as the plants develop their own personalities of aromas to attract or deter pests, nitrogen fixing, disrupting “patterns” and trap cropping.
The best thing about companion planting is the biodiversity it creates in your garden; the variety of life forms in your garden and not necessarily vegetables or fruit. There are awesome native trees and shrubs that work in harmony so you will never be without the array of critters like birds, pollinating insects (like butterflies, bees, and native wasps), reptiles, beetles and all sorts of helpful garden buddies. Therefore by encouraging various types of good guys, the bad guys should never get a good foothold!
Therefore there are definite combinations that work and also some that definitely don’t work.