Blue Bush Plant Care

Blue Bush (Pteronia glauca) belongs to the Asteraceae family within the Pteronia genus. Blue Bush is native to the Karoo regions of South Africa. Blue Bush is also known as Cape Bush, Pteronia glauca.

Blue Bush displays a low spreading ground cover growth habit, reaching up to 0.5 ft tall with a spread of approximately 1 ft. Blue Bush produces small daisy-like flowers in various colors.

Leaf size: approximately 2 inches.

Water a young or newly planted Blue Bush 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.

Blue Bush thrives in full sun to partial shade.

Pteronia glauca tolerates temperatures of 50–80°F. Blue Bush prefers humidity levels of 40–70%.

Well-draining sandy soil mix with added organic matter. Good drainage is essential for Blue Bush to prevent waterlogging, which leads to root rot and fungal issues.

Feed Blue Bush 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 soil mix with added organic matter. Avoid low spots where water collects after rain.

Blue Bush is suited to USDA Zone 9a – 11b.

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.

Blue Bush can spread to about 1 ft (0.3 m) and reach about 1 ft (0 m) tall. Space plants about 1 ft (0.3 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 Blue Bush 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.

Blue Bush is frost-tender (hardy to USDA zone 9). In colder areas grow it in a container and move it to a bright, frost-free place before the first frost.

Blue Bush can be propagated through seeds, stem cuttings. Similar propagation techniques also apply to shrubby pteronia plant care, which shares the same genus.

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

Blue Bush 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.

Blue Bush grows outdoors in USDA Zone 9a – 11b. It survives winters down to planting zone 9a. Blue Bush is native to the Karoo regions of South Africa. In cooler regions, grow Blue Bush as a houseplant or bring it indoors before the first frost.