Olluco Plant Care

Olluco (Ullucus tuberosus) belongs to the Basellaceae family within the Ullucus genus. Olluco is also known as Ulluco.

Olluco displays a compact, bushy habit growth habit, reaching up to 1.5 ft tall with a spread of approximately 1.5 ft. Olluco produces small, inconspicuous flowers.

Leaf size: approximately 4 inches.

Water a young or newly planted Olluco every 5–7 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.

Olluco thrives in full sun to partial shade.

Ullucus tuberosus tolerates temperatures of 60–80°F. Olluco prefers humidity levels of 50–70%. A pebble tray or humidifier helps maintain adequate moisture around the plant.

Loamy, well-draining soil with added compost for nutrients. Good drainage is essential for Olluco to prevent waterlogging, which leads to root rot and fungal issues.

Feed Olluco 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 full sun to partial shade and loamy, well-draining soil with added compost for nutrients. Avoid low spots where water collects after rain.

Olluco is suited to USDA Zone 13a.

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.

Olluco can spread to about 2 ft (0.5 m) and reach about 2 ft (0 m) tall. Space plants about 2 ft (0.5 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 plant spacing calculator.

Prune Olluco 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.

Olluco 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.

Olluco can be propagated through by seeds.

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

Olluco is susceptible to aphids, spider mites, whiteflies. 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.

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