Sow tender herb seeds such as basil, marjoram, coriander, and tender perennials such as French tarragon indoors in spring for planting outdoors after all risk of frost passes.
Some herbs can live outside all year once they are established. Try mint, oregano, rosemary, thyme and sage. These can be sown indoors as with the tender herbs, or sow them outdoors in May in containers.
Delay buying herb plants from garden centres until the weather warms up in late spring. Winter planted herbs are vulnerable to root damage in the cold wet potting media.
Herbs are usually straight forward to propagate.