Herbs repel pests, attract helpful insects, and generally bring the garden into balance. Planting herbs nearby improves the growth and yield of most vegetables.
Perennial herbs may take a while to sprout. Starting them in pots will prevent the seeds from being disturbed or forgotten in vegetable or flower beds. See The Medicinal Herb Grower in our book section for excellent advice on growing herbs and indeed all sorts or perennials, trees, and shrubs from seed.