Megahertzia amplexicaulis Plant Care

Megahertzia amplexicaulis (Megahertzia amplexicaulis) belongs to the Proteaceae family within the Megahertzia genus. Megahertzia amplexicaulis is native to Queensland.

Megahertzia amplexicaulis displays a tall, upright tree growth habit, reaching up to 15 ft tall with a spread of approximately 8 ft. Megahertzia amplexicaulis produces showy clusters of small, colorful flowers.

Leaf size: approximately 6 inches.

Water a young or newly planted Megahertzia amplexicaulis 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.

Megahertzia amplexicaulis thrives in full sun to partial shade.

Megahertzia amplexicaulis tolerates temperatures of 60–80°F. Megahertzia amplexicaulis prefers humidity levels of 40–70%.

Well-draining acidic soil mix with added organic matter like peat moss and pine bark. Good drainage is essential for Megahertzia amplexicaulis to prevent waterlogging, which leads to root rot and fungal issues.

Feed Megahertzia amplexicaulis 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 full sun to partial shade and well-draining acidic soil mix with added organic matter like peat moss and pine bark. Avoid low spots where water collects after rain.

Megahertzia amplexicaulis is suited to USDA Zone 13a.

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.

Megahertzia amplexicaulis can spread to about 8 ft (2.4 m) and reach about 15 ft (5 m) tall. Space plants about 8 ft (2.4 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 Megahertzia amplexicaulis 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.

Megahertzia amplexicaulis is frost-tender (hardy to USDA zone 13). In colder areas grow it in a container and move it to a bright, frost-free place before the first frost.

Megahertzia amplexicaulis can be propagated through seeds, cuttings.

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

Megahertzia amplexicaulis is susceptible to aphids, scale insects, spider mites. 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.

Megahertzia amplexicaulis grows outdoors in USDA Zone 13a. It survives winters down to planting zone 13a. Megahertzia amplexicaulis is native to Queensland. In cooler regions, grow Megahertzia amplexicaulis as a houseplant or bring it indoors before the first frost.