Mekong Sage Plant Care

Mekong Sage (Salvia mekongensis) belongs to the Lamiaceae family within the Salvia genus. Mekong Sage is native to Yunnan province in China, found growing on hilly grasslands at 2,800 to 4,100 m elevation.

Mekong Sage displays an upright, bushy shrub growth habit, reaching up to 3 ft tall with a spread of approximately 2 ft. Mekong Sage produces colorful spikes of tubular flowers in shades of blue, purple, pink, or red.

Leaf size: approximately 4 inches.

Water a young or newly planted Mekong Sage every 7–14 days, soaking the whole root zone, until it is established — usually one to two growing seasons. Established shrubs mainly need water during long dry spells. In a container, water whenever the top few centimetres of soil are dry.

Mekong Sage thrives in full sun to partial shade.

Salvia mekongensis tolerates temperatures of 50–90°F. Mekong Sage prefers humidity levels of 40–70%.

Well-draining sandy loam with added perlite for improved drainage. Good drainage is essential for Mekong Sage to prevent waterlogging, which leads to root rot and fungal issues.

Feed Mekong Sage every 6 months during the growing season with a balanced, slow-release fertilizer at the rate on the label. Established shrubs in good soil often need little extra feeding, so let weak growth or pale foliage guide you.

Stop feeding by late summer so new growth can harden before winter.

The PlantoScan app can remind you when to water and when to fertilize each plant.

Choose a spot with full sun to partial shade and well-draining sandy loam with added perlite for improved drainage. Avoid low spots where water collects after rain.

Mekong Sage is suited to USDA Zone 12a.

Plant container-grown or balled-and-burlapped shrubs in spring or early autumn, setting the root flare at soil level, and water well after planting.

Mekong Sage can spread to about 2 ft (0.6 m) and reach about 3 ft (1 m) tall. Space plants about 2 ft (0.6 m) apart so mature crowns don't crowd each other, and plant at least half that distance from buildings, fences and paths.

Planning a row or hedge? Try the plant spacing calculator.

Prune Mekong Sage while it is dormant in late winter: first remove dead, damaged and crossing branches, then thin lightly for shape.

If it flowers in spring, prune right after flowering instead so you don't remove next year's buds. Never take off more than about a quarter of the shrub in one year.

Mekong Sage is frost-tender (hardy to USDA zone 12). In colder areas grow it in a container and move it to a bright, frost-free place before the first frost.

Mekong Sage can be propagated through seeds, stem cuttings. Similar propagation techniques also apply to sage plant plant care, which shares the same genus.

See all plants toxic to cats and plants toxic to dogs.

Mekong Sage is susceptible to aphids, spider mites, whiteflies. Inspect the foliage regularly, especially along leaf undersides and stems. Treat infestations promptly with insecticidal soap or neem oil to prevent spread.

Yellow leaves, brown tips or drooping? See common plant problems and how to fix them.

Mekong Sage grows outdoors in USDA Zone 12a. It survives winters down to planting zone 12a. Mekong Sage is native to Yunnan province in China, found growing on hilly grasslands at 2,800 to 4,100 m elevation. In cooler regions, grow Mekong Sage as a houseplant or bring it indoors before the first frost.