Wallflower Heath Plant Care

Wallflower Heath (Sannantha collina) belongs to the Myrtaceae family within the Sannantha genus. Wallflower Heath is native to eastern Australia. Wallflower Heath is also known as Heath Myrtle.

Wallflower Heath displays a compact, spreading shrub growth habit, reaching up to 3 ft tall with a spread of approximately 4 ft. Wallflower Heath produces small white or pink flowers in clusters.

Leaf size: approximately 2 inches.

Water a young or newly planted Wallflower Heath every 7–10 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.

Wallflower Heath thrives in full sun to partial shade.

Sannantha collina tolerates temperatures of 60–80°F. Wallflower Heath prefers humidity levels of 50–70%. A pebble tray or humidifier helps maintain adequate moisture around the plant.

Well-draining, acidic soil with high organic matter content. Good drainage is essential for Wallflower Heath to prevent waterlogging, which leads to root rot and fungal issues.

Feed Wallflower Heath 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 well-draining, acidic soil with high organic matter content. Avoid low spots where water collects after rain.

Wallflower Heath 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.

Wallflower Heath can spread to about 4 ft (1.2 m) and reach about 3 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 Wallflower Heath 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.

Wallflower Heath 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.

Wallflower Heath can be propagated through seeds, softwood cuttings. Similar propagation techniques also apply to slender sannantha plant care, which shares the same genus.

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Wallflower Heath 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.

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