Island Guettarda Plant Care

Island Guettarda (Guettarda insularis) belongs to the Rubiaceae family within the Guettarda genus. Island Guettarda is native to Socorro Island, the largest of the Revillagigedo Islands which lie west of Mexico's Pacific coast.

Island Guettarda displays an upright, spreading shrub growth habit, reaching up to 4 ft tall with a spread of approximately 4 ft. Island Guettarda produces small white fragrant flowers in clusters.

Leaf size: approximately 4 inches.

Water a young or newly planted Island Guettarda every 7–14 days, soaking the whole root zone, until it is established — usually one to two growing seasons. Established shrubs mainly need water during long dry spells. In a container, water whenever the top few centimetres of soil are dry.

Island Guettarda thrives in partial shade to full sun.

Guettarda insularis tolerates temperatures of 65–80°F. Island Guettarda prefers humidity levels of 50–70%. A pebble tray or humidifier helps maintain adequate moisture around the plant.

Well-draining, slightly acidic soil with added organic matter like compost or peat moss. Good drainage is essential for Island Guettarda to prevent waterlogging, which leads to root rot and fungal issues.

Feed Island Guettarda every 6 months during the growing season with a balanced, slow-release fertilizer at the rate on the label. Established shrubs 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, slightly acidic soil with added organic matter like compost or peat moss. Avoid low spots where water collects after rain.

Island Guettarda is suited to USDA Zone 13b.

Plant container-grown or balled-and-burlapped shrubs in spring or early autumn, setting the root flare at soil level, and water well after planting.

Island Guettarda can spread to about 4 ft (1.2 m) and reach about 4 ft (1 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 plant spacing calculator.

Prune Island Guettarda 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 shrub in one year.

Island Guettarda 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.

Island Guettarda can be propagated through seeds, stem cuttings. Similar propagation techniques also apply to scabra guettarda plant care, which shares the same genus.

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

Island Guettarda 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.

Island Guettarda grows outdoors in USDA Zone 13b. It survives winters down to planting zone 13b. Island Guettarda is native to Socorro Island, the largest of the Revillagigedo Islands which lie west of Mexico's Pacific coast. In cooler regions, grow Island Guettarda as a houseplant or bring it indoors before the first frost.