The distinctive black color on this South American cultivar is found on the calyx — the floral part surrounding the outstanding cobalt blue flowers, which attract hummingbirds, moths, and butterflies looking for nectar. The lush green foliage, when crushed, smells like licorice (thus the common name "anise-scented sage" for the Salvia guaranitica cultivars).

Salvia guaranitica can grow up to 5 feet tall in full sun, in humus-rich, well-drained soil, but typically grows to 3 feet by 3 feet. A subtropical perennial, this sage can be grown in the Midwest if well established by midsummer. The plant spreads by rhizomes, which overwinter and can spread to 3 feet underground. A good cover of leaf mulch will help keep them warm in winter and offer soil amendment in spring.