Ewartiothamnus sinclairii Plant Care

Ewartiothamnus sinclairii (Ewartiothamnus sinclairii) belongs to the Asteraceae family within the Ewartiothamnus genus. Ewartiothamnus sinclairii is native to Marlborough region.

Ewartiothamnus sinclairii displays a compact, mounding shrub growth habit, reaching up to 2.5 ft tall with a spread of approximately 3 ft. Ewartiothamnus sinclairii produces small daisy-like flowers in shades of yellow and orange.

Leaf size: approximately 4 inches.

Water a young or newly planted Ewartiothamnus sinclairii 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.

Ewartiothamnus sinclairii thrives in full sun to partial shade.

Ewartiothamnus sinclairii tolerates temperatures of 60–80°F. Ewartiothamnus sinclairii prefers humidity levels of 40–70%.

Well-draining sandy loam with added organic matter for moisture retention. Good drainage is essential for Ewartiothamnus sinclairii to prevent waterlogging, which leads to root rot and fungal issues.

Feed Ewartiothamnus sinclairii 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 sandy loam with added organic matter for moisture retention. Avoid low spots where water collects after rain.

Ewartiothamnus sinclairii 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.

Ewartiothamnus sinclairii can spread to about 3 ft (0.9 m) and reach about 3 ft (1 m) tall. Space plants about 3 ft (0.9 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 Ewartiothamnus sinclairii 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.

Ewartiothamnus sinclairii 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.

Ewartiothamnus sinclairii can be propagated through seeds, division of root ball.

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

Ewartiothamnus sinclairii is susceptible to aphids, whiteflies, 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.

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