Retrophyllum piresii Plant Care

Retrophyllum piresii (Retrophyllum piresii) belongs to the Podocarpaceae family within the Retrophyllum genus.

Retrophyllum piresii displays a pyramidal, conical tree growth habit, reaching up to 30 ft tall with a spread of approximately 15 ft. Retrophyllum piresii produces small, inconspicuous male and female cones.

Leaf size: approximately 2 inches.

Water a young or newly planted Retrophyllum piresii 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.

Retrophyllum piresii thrives in partial shade to full sun.

Retrophyllum piresii tolerates temperatures of 50–80°F. Retrophyllum piresii prefers humidity levels of 50–80%. A pebble tray or humidifier helps maintain adequate moisture around the plant.

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

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

Retrophyllum piresii is suited to USDA Zone 12a.

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.

Retrophyllum piresii 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 Retrophyllum piresii 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.

Retrophyllum piresii 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.

Retrophyllum piresii can be propagated through seeds, stem cuttings. Similar propagation techniques also apply to dacrydium cupressinum plant care, which shares the same genus.

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Retrophyllum piresii 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.

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