Marquesia excelsa Plant Care

Marquesia excelsa (Marquesia excelsa) belongs to the Dipterocarpaceae family within the Marquesia genus. Marquesia excelsa is native to Gabon and mainland Equatorial Guinea.

Marquesia excelsa displays a tall canopy tree growth habit, reaching up to 80 ft tall with a spread of approximately 40 ft. Marquesia excelsa produces small, inconspicuous flowers.

Leaf size: approximately 6 inches.

Water a young or newly planted Marquesia excelsa 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.

Marquesia excelsa thrives in full sun to partial shade.

Marquesia excelsa tolerates temperatures of 65–85°F. Marquesia excelsa 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 Marquesia excelsa to prevent waterlogging, which leads to root rot and fungal issues.

Feed Marquesia excelsa 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 to partial shade and well-draining loamy soil with high organic content. Avoid low spots where water collects after rain.

Marquesia excelsa is suited to USDA Zone 11b – 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.

Marquesia excelsa can spread to about 40 ft (12.2 m) and reach about 80 ft (24 m) tall. Space plants about 40 ft (12.2 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 Marquesia excelsa 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.

Marquesia excelsa is frost-tender (hardy to USDA zone 11). In colder areas grow it in a container and move it to a bright, frost-free place before the first frost.

Marquesia excelsa can be propagated through seeds, stem cuttings. Similar propagation techniques also apply to marquesia acuminata plant care, which shares the same genus.

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Marquesia excelsa is susceptible to scale insects, caterpillars. 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.

Marquesia excelsa grows outdoors in USDA Zone 11b – 12b. It survives winters down to planting zone 11b. Marquesia excelsa is native to Gabon and mainland Equatorial Guinea. In cooler regions, grow Marquesia excelsa as a houseplant or bring it indoors before the first frost.