Silver Wattle Plant Care

Silver Wattle (Montitega dealbata) belongs to the Ericaceae family within the Montitega genus. Silver Wattle is native to Tasmania and New Zealand. Silver Wattle is also known as Mimosa dealbata.

Silver Wattle displays a low spreading shrub growth habit, reaching up to 1.5 ft tall with a spread of approximately 2 ft. Silver Wattle produces bell-shaped flowers in shades of pink and white.

Leaf size: approximately 4 inches.

Water a young or newly planted Silver Wattle 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.

Silver Wattle thrives in partial shade to dappled sunlight. Avoid placing Silver Wattle in direct, harsh sunlight for extended periods, as this can scorch the foliage.

Montitega dealbata tolerates temperatures of 55–75°F. Silver Wattle prefers humidity levels of 40–60%.

Well-draining acidic soil mix with peat moss and pine bark. Good drainage is essential for Silver Wattle to prevent waterlogging, which leads to root rot and fungal issues.

Feed Silver Wattle 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 dappled sunlight and well-draining acidic soil mix with peat moss and pine bark. Avoid low spots where water collects after rain.

Silver Wattle is suited to USDA Zone 8a – 9b.

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.

Silver Wattle can spread to about 2 ft (0.6 m) and reach about 2 ft (0 m) tall. Space plants about 2 ft (0.6 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 plant spacing calculator.

Prune Silver Wattle 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.

Silver Wattle is hardy down to USDA zone 8a, so once established it can stay outdoors through winter in that zone and warmer ones.

Water deeply in late autumn before the ground freezes, and spread a 5–8 cm (2–3 in) layer of mulch over the root zone, keeping it away from the trunk.

Young and container-grown shrubs need extra protection: roots in a pot freeze much more easily than roots in the ground.

Silver Wattle can be propagated through stem cuttings, layering, division.

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

Silver Wattle is susceptible to spider mites, lace bugs, root weevils. 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.

Silver Wattle grows outdoors in USDA Zone 8a – 9b. It survives winters down to planting zone 8a. Silver Wattle is native to Tasmania and New Zealand.