Assam Sal Plant Care

Assam Sal (Shorea assamica) belongs to the Dipterocarpaceae family within the Shorea genus. Assam Sal is also known as Mekong Sal.

Assam Sal displays a tall canopy tree growth habit, reaching up to 100 ft tall with a spread of approximately 50 ft. Assam Sal produces small, inconspicuous flowers.

Leaf size: approximately 6 inches.

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

Assam Sal thrives in full sun.

Shorea assamica tolerates temperatures of 65–85°F. Assam Sal prefers humidity levels of 60–80%. A pebble tray or humidifier helps maintain adequate moisture around the plant.

Well-draining loamy soil with high organic content. Good drainage is essential for Assam Sal to prevent waterlogging, which leads to root rot and fungal issues.

Feed Assam Sal every 8 months during the growing season with a balanced, slow-release fertilizer at the rate on the label. Established trees 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 and well-draining loamy soil with high organic content. Avoid low spots where water collects after rain.

Assam Sal is suited to USDA Zone 10b – 12b.

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

Assam Sal can spread to about 50 ft (15.2 m) and reach about 100 ft (30 m) tall. Space plants about 50 ft (15.2 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 tree spacing calculator.

Prune Assam Sal 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 tree in one year.

Assam Sal is frost-tender (hardy to USDA zone 10). In colder areas grow it in a container and move it to a bright, frost-free place before the first frost.

Assam Sal can be propagated through seeds, cuttings.

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

Assam Sal is susceptible to termites, scale insects. 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.

Assam Sal grows outdoors in USDA Zone 10b – 12b. It survives winters down to planting zone 10b. In cooler regions, grow Assam Sal as a houseplant or bring it indoors before the first frost.