Companion plants are very different in Nth/Sth hemispheres and many combinations are even more local.
Gertrud Francke - Companion Planting has some good combinations, a good alternative (cover-crop gardening) and comes highly recommended by Geoff Lawton.
Examine your lifestyle, multiply it by 7.7 billion other ego-monkeys with similar desires and query whether that global impact is conscionable.
Don't go into the long grass, or the tiny ads will get you.
montana community seeking 20 people who are gardeners or want to be gardeners