Classification of Herbs
Herbs are classified either as annuals, biennials, or perennials. Annual herbs are usually grown from seed; they grow, flower, and produce seed during one season, and then die. Biennial herbs grow for two seasons, flowering the second year only. Perennial herbs, once established, overwinter and flower each season. Some herbs are tender perennials; these do not survive severe winters and are best grown as annuals or over-wintered indoors.

Availability of Herb Seeds and Plants
During the spring and fall seasons, you might find a good selection of herb plants and seeds at your local independent nursery and garden center. If not, various herb plants and seeds can be obtained from online mail order companies. The seeds and plants of the more common herbs, such as dill, basil, and parsley are usually available from local nurseries, while the less common ones might have to be purchaed from companies specializing in herbs.