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Salvia greggii: Discovering a Riot of Color

Sep 14, 2012

Salvia greggii: Discovering a Riot of Color

It would be inaccurate to refer to the woody perennial Autumn Sage, or Salvia greggii, as coming in a rainbow of colors, because there is no true blue in the bunch.

However, S. greggii cultivars form a riot of lipstick-intense reds, pinks, corals, apricots, oranges, lavenders and purples. Whites, pale yellows and bicolors also are members of the vivid species. The palate expands further still in the case of crosses between S. greggii and other Salvias.

No doubt it was the surprising color and fragrance of these shrubs in the dry, rocky landscapes of Texas and Northern Mexico that piqued the scientific curiosity of 19th century frontiersman, doctor, trader, writer and amateur botanist Josiah Gregg.

War and Peaceful Discovery

Gregg was a Tennessean who found a cure for frail health in the wide, open spaces of the West. Beginning in the 1830s, he made multiple journeys across the Great Plains to the Southwest. Gregg became fluent in Spanish and, in 1844, published Commerce of the Prairies about his experiences along the Santa Fe Trail.

Consequently, in late 1846, the U.S. Army persuaded the somewhat reluctant Gregg to accompany its Arkansas Regiment as an interpreter and guide during the Mexican-American War.

Somehow, Gregg found time to pursue a new hobby inspired by medical school mentors who shared his interest in botany. He began collecting plant specimens around Saltillo, Mexico, near the site of the Battle of Buena Vista and sent them back
east to his friends.

Eventually, the plants reached Harvard University where Asa Gray classified them, naming many after Gregg. Some have been reclassified and retitled since that time, but the botanical name of Autumn Sage has retained its connection to Gregg.

At Home in Sunny, Wide-Open Spaces

In his biography about Gregg, Southwestern botanical historian Gene Jercinovic describes him as being someone “who enjoyed being in the middle of nowhere.” It is also an apt description for S. Greggii, a plant that likes wide-open spaces and full sun except in desert lowlands where the heat may be so severe that it needs partial shade. Despite its common name, Autumn Sage blooms vigorously from summer through fall.

Scientists now know that S. greggii is native to a long, stretch of high-altitude habitat from Southwestern Texas to the state of San Luis Potosi in central Mexico.

Horticulturists have discovered that it can thrive in U.S. Department of Agriculture plant hardiness zones 5 to 10. With careful planting and nurturance, it survives chilly Rocky Mountain winters as well as the humidity of semi-tropical and temperate coastal areas.

S. greggii is low maintenance, but it needs well-drained soil, deep watering once a week when heat is intense and a heavy blanket of leaf mulch during winter in areas with freezing temperatures. To avoid overly woody growth and lankiness as well as to encourage profuse, repeated bloom, some gardeners trim about a third of its height at the end of winter, spring and summer.

Hundreds of Varieties

Although first cultivated in 1885, S. greggii didn’t become begin its ascent to Salvia stardom in West Coast nurseries until 1985. Now there are hundreds of varieties to choose from, and new hybrids are introduced annually.

At Flowers by the Sea, we base our choices on vigor, a broad range of colors, long bloom times and beautiful foliage as well as flowers. From the ethereal, luminescent white blossoms of S. greggii ‘Texas Wedding’ to the hot pink of S. greggii ‘Cold Hardy Pink’, we love all our Autumn Sage cultivars.

One of our favorite new additions is S. greggii ‘Lowrey’s Peach’, which has glossy foliage and reddish-orange blossoms that end in creamy peach bottom lips with bright yellow throats. It thrives in Zones 7 to 9 and is hardy to at least 10 degrees F. Similar to most S. greggii cultivars, Lowrey’s Peach is a short, mounding shrub. However, it is one of our bigger choices, growing up to 36 inches tall and wide. Mass it with flowers in shades of deep red, pink and yellow, and this standout will inspire a riot of compliments.

Updated November 2, 2015
 

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