About Salvia guaranitica A.St.-Hil. ex Benth.
This species is a perennial subshrub that grows 4 to 5 feet (1.2 to 1.5 meters) tall, and spreads into large patches via its spreading roots. Its leaves are ovate, 4 cm (1.6 in) long and nearly as wide, a fresh mint green in color, and release an anise scent when crushed. The inflorescences can reach up to 25 cm (9.8 in) long, and bear flowers in various shades of blue, including an unusually true blue shade. In cold regions, flowering starts in mid-summer and continues until the first frost. Salvia guaranitica is a popular ornamental plant grown in mild climates. It tolerates both full sun and three-quarter sunlight, and grows best in well-draining soil. Numerous cultivars have been selected for cultivation: 'Argentine Skies' produces pale blue flowers, 'Black and Blue' has a very dark violet-blue calyx, 'Blue Ensign' bears large blue flowers, and 'Purple Splendor' produces light purple flowers. The cultivar 'Blue Enigma', which bears pure blue flowers, has earned the Royal Horticultural Society's Award of Garden Merit. The species name comes from the Guaraní people of Brazil, who are reported to have used the plant's leaves as a sedative.
