Glionnetia sericea Plant Care

Glionnetia sericea (Glionnetia sericea) belongs to the Rubiaceae family within the Glionnetia genus. Glionnetia sericea is native to Mahé and Silhouette Island in the Seychelles.

Glionnetia sericea displays a tall, upright tree growth habit, reaching up to 10 ft tall with a spread of approximately 5 ft. Glionnetia sericea produces small, white fragrant flowers in clusters.

Leaf size: approximately 6 inches.

Water a young or newly planted Glionnetia sericea 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.

Glionnetia sericea thrives in bright indirect light. Avoid placing Glionnetia sericea in direct, harsh sunlight for extended periods, as this can scorch the foliage.

Glionnetia sericea tolerates temperatures of 65–80°F. Glionnetia sericea prefers humidity levels of 50–70%. 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 Glionnetia sericea to prevent waterlogging, which leads to root rot and fungal issues.

Feed Glionnetia sericea 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 bright indirect light and rich, well-draining soil with high organic content. Avoid low spots where water collects after rain.

Glionnetia sericea 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.

Glionnetia sericea can spread to about 5 ft (1.5 m) and reach about 10 ft (3 m) tall. Space plants about 5 ft (1.5 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 Glionnetia sericea 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.

Glionnetia sericea 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.

Glionnetia sericea can be propagated through seeds, stem cuttings.

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

Glionnetia sericea 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.

Glionnetia sericea grows outdoors in USDA Zone 13b. It survives winters down to planting zone 13b. Glionnetia sericea is native to Mahé and Silhouette Island in the Seychelles. In cooler regions, grow Glionnetia sericea as a houseplant or bring it indoors before the first frost.