Two-horned Rinorea Plant Care

Two-horned Rinorea (Rinorea bicornuta) belongs to the Violaceae family within the Rinorea genus. Two-horned Rinorea is native to Brazil.

Two-horned Rinorea displays a small tree or shrub growth habit, reaching up to 6 ft tall with a spread of approximately 4 ft. Two-horned Rinorea produces small, inconspicuous flowers in clusters.

Leaf size: approximately 4 inches.

Water a young or newly planted Two-horned Rinorea every 7–10 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.

Two-horned Rinorea thrives in filtered sunlight or partial shade. Avoid placing Two-horned Rinorea in direct, harsh sunlight for extended periods, as this can scorch the foliage.

Rinorea bicornuta tolerates temperatures of 65–80°F. Two-horned Rinorea prefers humidity levels of 50–70%. A pebble tray or humidifier helps maintain adequate moisture around the plant.

Well-draining, slightly acidic soil with high organic content. Good drainage is essential for Two-horned Rinorea to prevent waterlogging, which leads to root rot and fungal issues.

Feed Two-horned Rinorea 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 or partial shade and well-draining, slightly acidic soil with high organic content. Avoid low spots where water collects after rain.

Two-horned Rinorea is suited to USDA Zone 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.

Two-horned Rinorea can spread to about 4 ft (1.2 m) and reach about 6 ft (2 m) tall. Space plants about 4 ft (1.2 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 Two-horned Rinorea 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.

Two-horned Rinorea 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.

Two-horned Rinorea can be propagated through seeds, stem cuttings. Similar propagation techniques also apply to rinorea abbreviata plant care, which shares the same genus.

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Two-horned Rinorea 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.

Two-horned Rinorea grows outdoors in USDA Zone 13b. It survives winters down to planting zone 13b. Two-horned Rinorea is native to Brazil. In cooler regions, grow Two-horned Rinorea as a houseplant or bring it indoors before the first frost.