Horsfieldia ampla Plant Care

Horsfieldia ampla (Horsfieldia ampla) belongs to the Myristicaceae family within the Horsfieldia genus. Horsfieldia ampla is native to those provinces associated with the Sepik river, growing in dense humid forest.

Horsfieldia ampla displays a tall, upright tree growth habit, reaching up to 30 ft tall with a spread of approximately 15 ft. Horsfieldia ampla produces small, inconspicuous flowers.

Leaf size: approximately 6 inches.

Water a young or newly planted Horsfieldia ampla 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.

Horsfieldia ampla thrives in filtered sunlight. Avoid placing Horsfieldia ampla in direct, harsh sunlight for extended periods, as this can scorch the foliage.

Horsfieldia ampla tolerates temperatures of 65–80°F. Horsfieldia ampla prefers humidity levels of 60–80%. A pebble tray or humidifier helps maintain adequate moisture around the plant.

Rich, well-draining soil with high organic content. Good drainage is essential for Horsfieldia ampla to prevent waterlogging, which leads to root rot and fungal issues.

Feed Horsfieldia ampla every 6 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 filtered sunlight and rich, well-draining soil with high organic content. Avoid low spots where water collects after rain.

Horsfieldia ampla is suited to USDA Zone 12a – 13b.

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.

Horsfieldia ampla can spread to about 15 ft (4.6 m) and reach about 30 ft (9 m) tall. Space plants about 15 ft (4.6 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 tree spacing calculator.

Prune Horsfieldia ampla 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.

Horsfieldia ampla 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.

Horsfieldia ampla can be propagated through seeds, air layering. Similar propagation techniques also apply to red bloodwood plant care, which shares the same genus.

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

Horsfieldia ampla is susceptible to spider mites, 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.

Horsfieldia ampla grows outdoors in USDA Zone 12a – 13b. It survives winters down to planting zone 12a. Horsfieldia ampla is native to those provinces associated with the Sepik river, growing in dense humid forest. In cooler regions, grow Horsfieldia ampla as a houseplant or bring it indoors before the first frost.