Grande Lilly Pilly Plant Care

Grande Lilly Pilly (Syzygium grande) belongs to the Myrtaceae family within the Syzygium genus. Grande Lilly Pilly is also known as Watergum.

Grande Lilly Pilly displays a tall, dense tree or shrub growth habit, reaching up to 20 ft tall with a spread of approximately 15 ft. Grande Lilly Pilly produces small, white, fluffy flowers in clusters.

Leaf size: approximately 4 inches.

Water a young or newly planted Grande Lilly Pilly 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.

Grande Lilly Pilly thrives in full sun to partial shade.

Syzygium grande tolerates temperatures of 60–85°F. Grande Lilly Pilly prefers humidity levels of 50–80%. 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 Grande Lilly Pilly to prevent waterlogging, which leads to root rot and fungal issues.

Feed Grande Lilly Pilly 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 full sun to partial shade and well-draining, slightly acidic soil with added organic matter like compost or peat moss. Avoid low spots where water collects after rain.

Grande Lilly Pilly is suited to USDA Zone 13a.

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.

Grande Lilly Pilly can spread to about 15 ft (4.6 m) and reach about 20 ft (6 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 Grande Lilly Pilly 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.

Grande Lilly Pilly 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.

Grande Lilly Pilly can be propagated through seeds, semi-hardwood cuttings. Similar propagation techniques also apply to waterberry plant care, which shares the same genus.

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

Grande Lilly Pilly is susceptible to aphids, scale insects, caterpillars. 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.

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