Today I’m planning my vegetable beds with herbal companions in mind. Certain herbs can improve the taste or vigor of vegetables and repel harmful insects and attract beneficial ones. A few vegetables don’t like certain herbs, like dill and carrots; but valerian, thyme, and marjoram are generally beneficial throughout the garden. Mint and lavender repel mice, and hyssop improves the productivity of grapevines.
This is a wonderful reference for companion planting generally, including sections on herbs, vegetables, flowers, and trees: