(Yunnan Sage or yun nan shu wei cao) Yunnan Sage's tall spikes of violet-to-purple flowers bloom from summer into fall. Native to Southwestern China's provinces of Yunnan, Guizhou and Sichuan, it grows on shady, grassy hillsides and along forest margins at elevations up to 9,500 feet.
This is an important medicinal sage in Asia. Its bright red taproots are made into herbal remedies used to strengthen the immune system. Research laboratories are just now identifying the active ingredients, after a millennium of use by the Chinese.
Yunnan Sage tolerates cold as well as heat. It needs partial to full shade, average to plentiful water and well-drained soil. Plant it in moist areas, woodland gardens, perennial borders and along pathways where you can see it close up.
Highly recommended!
Here are some guidelines for success with this plant in your garden.
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Exposure
This plant tolerates deep shade almost all day, such as under dense trees or on the north side of a building. Few Salvias can do this; those that do are highly valued. 
This plant can handle extreme heat.
Full-sun Salvias that don’t like any shade are among the most heat tolerant. Heat-loving Salvias also are often drought tolerant. Moisture-conserving features, such as fuzzy leaves, help them stay perky at high temperatures.
Heat-tolerant Salvias are fine choices for western and southern exposures.
This plant grows well in partial shade, such as the kind on the edge of woodlands or under deciduous trees with breaks in the foliage through which dappled sunlight penetrates. Many Salvias thrive in partial shade, including ones that spend part of their day in full sunlight. Some species need partial shade to overcome severe heat and dry soil.
Garden Uses
This plant grows well in an outdoor container, such as on a patio.
Some containerized Salvias leaf out and flower year after year following a period of dormancy. Annuals in containers may die back and appear to grow again when they reseed.
During extreme heat, check the soil in container plantings once or twice daily to be sure it doesn't completely dry out. Feel its surface for coolness, then gently poke a finger into the soil to check for dryness.
This herbaceous plant is known for its use in folk remedies.
Salvias have been used as healing herbs by a wide variety of cultures in the Americas, Europe and Asia. The genus name is from the Latin term “salvare,” which means to save.
When considering application of an herbal remedy to treat a medical problem, be sure to consult a physician first.
Growing Habit
To create a harmonious landscape plan, it is important to consider the heights of individual plants.
Height also affects function. Short Salvias often make excellent ground covers that conserve soil moisture and discourage weeds while also brightening your yard. Medium-height Salvias, such as ones 36 inches tall, often are ideal border plants. A tall Salvia planted singly can highlight a landscape; multiple plantings can form an attractive screen.
Plant this herbaceous species in the USDA Zones where it grows as a perennial, returning year after year.
After dying back to the ground at frost, herbaceous perennials emerge in the Spring with soft, new growth. A Salvia that is perennial in one region, may be an annual in another depending on local conditions, such as winter temperatures.
If you live in USDA Zone 5, for example, Salvias in our catalog cited as growing well in Zone 5 or lower will be perennial. Those cited as doing well in Zones 6 or higher may do well in Zone 5, but generally will act like annuals coming back from seed instead of the parent plant’s roots.
By considering the width of a plant, you can determine how many to place in a row or what other plants to grow with it.
For example, a narrow, moderate-height Salvia may look good interplanted with bushier species, kind of like Mutt and Jeff.
In contrast, wide-spreading Salvias are economical for hiding lengths of wall and fence or for creating hedge-like divisions in a yard.
Plant hardiness Zones defined by the U.S. Department of Agriculture tell you the minimum temperatures a plant can withstand in your garden. The USDA divides the nation into winter climate areas from coldest (Zone 1) to warmest (Zone 11).
However, it is sometimes possible to grow a Zone 6 Salvia as a perennial in Zone 5 if you provide preferential care, such as winter mulching and a location sheltered from harsh winds. In contrast, a Zone 9 Salvia may act like a perennial in Zone 10 if given a bit of shade or extra water.
Water Needs
This plant needs regular watering based on what is appropriate to your local conditions.
In some extremely hot, arid climates, this may mean daily watering in Summer. Although many drought-resistant Salvias survive on little to no watering due to local rainfall and deep roots meeting their moisture needs, others need regular doses. The size and frequency of the dose depends on your climate.
This plant thrives on or at least tolerates lots of water, especially when soil is well drained. They are generally not suitable for poorly drained soils.
A number of Salvias hold up well in areas where rainfall is a regular occurrence. Some even tolerate boggy conditions but only for a brief time. These are usually top-notch plants for regions of the country, such as the Southeast, where summers are soggy.
Blooming Season
This plant reaches peak bloom in Summer or flowers for much of the season.
Lots of Summer bloomers start flowering in Spring; others begin in Summer and keep up the show of color until frost.
There is a great deal of overlap in blooming seasons for Salvias.
Wildlife
Honeybees love this plant’s nectar. As a honeybee burrows down into a Salvia’s nectar-rich flowers to reach dinner, it accidentally gathers pollen and drops it on the stigma of that blossom or of ones on other nearby Salvias. Fertilization results in seed production.
By growing honeybee favorites, you attract these helpful pollinators to all your flowering plants and increase productivity
(Formosan Woodland Sage or Tai wan qin zhu cao) A native of Taiwan, this Salvia nipponica grows well in hot, humid climates as well as milder locales.
(Dan-shen Gansu) Growing into a large basal rosette of leaves measuring up to 3 feet across, Salvia przewalskii var. mandarinorum is known for its handsome foliage.
(Red Sage, Chinese Sage, Dan-shen) The bright red, finger-like roots of Salvia miltiorrhiza have a long history in traditional Chinese herbal medicine.
(Himalayan Cloud Sage) Nepal's Muktinath Valley -- a sacred site for Hindus and Buddhists -- is the place to go to see this majestically tall shade perennial in the wild. It grows at altitudes up to 14,000 feet and often emerges while the ground is still snowy.
(Campanula Leaf Sage) Spectacular yellow-flowering Salvias are rare, so this one stands out. Its large, almost round leaves form a basal clump that is attractive and tough. Bright yellow flowers arise from the clump on stems up to 48 inches tall.
(Mystery Yunnan Sage) Sometimes we come across a beauty that has no name. This lovely species from China's Yunnan province is an excellent example. Aside from lacking scientific and common names, it arrived here as an imported seed with little information about how the plant was discovered.
(Nanjinga Chinese Sage) Profuse blue-violet blossoms supported by wine-colored bracts whorl around the long floral stems of perennial Salvia chinensis ‘Nanjinga’. These verticillasters reach upward from glossy, dark green basal leaves with a purple sheen and hairy undersides.
(Nan dan shen) Lavender and pearly white blossoms shaped like parrot beaks are supported by burgundy and green calyxes on this cold-tolerant plant from Southern China. In summer, the flowers grow in whorl-like clusters on spikes reaching up to 5 feet tall above large, fuzzy, pinnate, olive-green leaves.
(san ye shu wei cao) So what do all those Pinyin words mean in this sage’s common name? We’ll give you an answer to the best of our ability in a minute. Meanwhile, we need to note that this medicinal Asian sage has handsome foliage and deep violet flowers.
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Posted: Monday, October 1, 2012
Synopsis:
Sometimes it’s wise not to get too tidy in the garden. When preparing Salvias for Winter dormancy, moderation is the rule. Regional climate affects how much trimming and mulching are necessary in late autumn.
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Posted: Tuesday, August 28, 2012
Synopsis:
Creating a flower garden in partial shade is not as challenging as planting in full shade, yet it requires selecting the right plants. Herbaceous Chinese Salvias can form a harmoniously composed partial-shade garden that soothe the eye with calming pastels.
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