Companion Planting: Herbs instead of Insecticides
Using herbs and flowers in this way can keep your garden "green" and prevent tears when you find your prized tomato plant cut off at the root by some nasty bug!
Petunias, marigolds and geraniums can be planted in a border around the garden or trees. If you want the benefit of catnip without digging it out of your garden for years to come, put in a large clay pot and place nearby. For other pest preventers, thoughtful interplanting of vegetables can help with the process.
Underlined items can be found at Beier's Greenhouse.
Ants: Pennyroyal, spearmint, southernwood, tansy
Aphids: Garlic, chives and other onions, coriander, anise, nasturtium and petunia around fruit trees
Borer: garlic, onion, tansy
Cabbage moth: mint, hyssop, rosemary, southernwood, thyme, sage, celery, catnip, nasturtium
Colorado potato beetle: green beans, horseradish, dead nettle, flax, catnip, coriander, tansy, nasturtium
Cucumber beetle: tansy, radish
Flea beetle: wormwood, mint, catnip, interplant crops with tomato
Japanese beetle: garlic, larkspur, tansy, rue, white geranium
Leafhopper: petunia, geranium
Mexican bean beetle: marigold, potato, rosemary, savory, petunia
Mites: garlic, onion, chives
Nematodes: marigold, salvia, dahlia, calendula, asparagus
Rose chafer: geranium, petunia, onion
Slug: rosemary, wormwood
Squash bug: tansy, nasturtium, catnip
Tomato hornworm: borage, marigold, opal basil
Whitefly: nasturtium, marigold