French tarragon, Artemisia dracunculus variety sativa, is a perennial hardy to Zone 4. It is often confused with Russian tarragon, which is not as flavorful, is propagated from seed and is not as desirable. French tarragon is used in cooking and does not produce viable seed so plants should be purchased or propagated from cuttings. Plant in full sun in well-drained soil. Allow plenty of space because it will branch out when mature. Cut it back for new, tender growth. Tarragon has a somewhat sweet, licorice flavor and is a favorite herb in French cuisine. It is also an ingredient of "fines herbes," which is the trio of tarragon, chervil, and parsley. Use it in sauces, soups, vegetables, and poultry dishes. It also makes wonderful herbal vinegar.