This herb is a cultivar of the common rosemary (Rosmarinus officinalis) known for its upright growth habit and aromatic, needle-like leaves. 
Physical Description:
Leaves: 'Tuscan Blue' rosemary has narrow, linear leaves that are dark green on top and grayish-white underneath. The leaves are highly aromatic and are commonly used in culinary applications.
Stems: The plant has woody stems that are often upright and can reach a height of 4 to 6 feet (1.2 to 1.8 meters).
Flowers: In spring, 'Tuscan Blue' produces small, blue flowers in clusters, adding ornamental value to the plant.
Uses:
Culinary: The aromatic leaves of 'Tuscan Blue' rosemary are commonly used in culinary applications to flavor a variety of dishes, including meats, vegetables, and bread.
Aromatic: The plant's aromatic qualities make it suitable for use in potpourris, sachets, or as a fragrant ornamental plant in gardens.
Growing Conditions:
Soil: Well-drained, sandy soil is ideal. Rosemary prefers slightly alkaline soil.
Watering: Allow the soil to dry out between waterings. Rosemary is drought-tolerant once established and prefers moderate watering.
Sunlight: 'Tuscan Blue' rosemary thrives in full sun. It should receive at least six hours of direct sunlight daily.
Hardiness: This cultivar is known for its hardiness and is often grown as a perennial in . 8 to 10. In colder climates, it may be grown as an annual or brought indoors during winter.
Harvesting:
Harvest rosemary leaves as needed for culinary purposes. Regular pruning can help maintain the plant's shape and encourage new growth.