Expect rapid, tall growth from this Salvia Mexicana . In the ground, Russell’s Mexican Sage can reach up to 10 feet tall and 5 feet wide, providing an effective screen of dark green, heart-shaped foliage. By late autumn it’s bursting with flowers.
Floriferous panicles of clear blue blossoms with green calyxes are a major attraction of this heat-tolerant sage. It does well in full sun to partial shade in USDA Zones 8 to 11. In cooler parts of its winter range, it may be best to grow this lush beauty in a large container beneficially positioned for protection from wind and cold. It freezes to ground when temperatures drop to 20 degrees F or a little bit higher and then returns the following spring. However, it generally grows to a shorter height in containers.
Similar to Salvia involucrata and Salvia madrensis , Russell’s Mexican Sage is one of the Jack and the Beanstalk giants of the Salvia world. Occasional trimming controls growth and helps maintain the fullness of its symmetrical, bushy form.
Give this perennial rich soils; it does well in mineral-rich clays as long as they drain well. In its native habitat of Central Mexico, it grows near the edge of forests and in open woods, which indicates a preference for partial shade. Although it only needs regular watering, it tolerates planting in areas that are steadily moist.
Use it to back other plantings or to provide autumn spectacle in a perennial border or cut flower garden. And grow it to provide a bounteous meal for butterflies, honeybees and hummingbirds at a season when other flowering plants are fading.
