To ensure the thriving growth of Black and Blue Salvia, plant it in well-draining soil and provide it with full sun to partial shade exposure. This plant enjoys regular watering, especially during hot and dry periods, but be cautious not to overwater to avoid root rot. Applying a balanced fertilizer once or twice a month during the growing season can enhance blooming and overall health.

At maturity, Black and Blue Salvia typically reaches a height of 3 to 4 feet (90 to 120 cm) and spreads about 2 to 3 feet (60 to 90 cm) in width. This perennial is hardy in USDA Zones 7 to 11. Its upright, bushy growth habit and striking flowers make it an excellent choice for borders, mixed plantings, or as a focal point in the garden.

Black and Blue Salvia is not considered toxic to humans, according to available information. However, as with any plant, it's essential to avoid ingesting large quantities of the plant material. Additionally, while it's generally safe, it's best to keep pets away from the plant, as some pets may experience mild gastrointestinal upset if they consume it.