#4 Companion Planting

Companion planting is a new practice in our garden this year and Louise Riotte's book, Carrots Love Tomatoes, is full of helpful info. 
Not only do some plants act as natural enhancers for their companions by putting beneficial things back in to the soil or using a nutrient that their companion doesn't need, some also benefit other plants by being a natural insect repellent for common pests that can destroy their neighbors.

I guess there are some companion planting ideas that I've grown up knowing about like marigolds to repel insects and garlic for voles.  But there's a lot more chemistry going on here than I ever dreamed!