Supplementum Horti botanici hafniensis Plant Care

Supplementum Horti botanici hafniensis (Carlina biebersteinii) belongs to the Asteraceae family within the Carlina genus. Supplementum Horti botanici hafniensis is native to Europe, Russia, Kazakhstan and in the Xinjiang region of China.

Supplementum Horti botanici hafniensis displays a low rosette, clumping growth habit, reaching up to 1.5 ft tall with a spread of approximately 1.5 ft. Supplementum Horti botanici hafniensis produces large, spiky, thistle-like flowers in shades of purple, pink, or white.

Leaf size: approximately 8 inches.

Water a young or newly planted Supplementum Horti botanici hafniensis 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.

Supplementum Horti botanici hafniensis thrives in full sun to partial shade.

Carlina biebersteinii tolerates temperatures of 60–75°F. Supplementum Horti botanici hafniensis prefers humidity levels of 40–60%.

Well-draining sandy soil with low to moderate fertility. Good drainage is essential for Supplementum Horti botanici hafniensis to prevent waterlogging, which leads to root rot and fungal issues.

Feed Supplementum Horti botanici hafniensis 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 with low to moderate fertility. Avoid low spots where water collects after rain.

Supplementum Horti botanici hafniensis is suited to USDA Zone 3a – 8b.

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.

Supplementum Horti botanici hafniensis can spread to about 2 ft (0.5 m) and reach about 2 ft (0 m) tall. Space plants about 2 ft (0.5 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 Supplementum Horti botanici hafniensis 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.

Supplementum Horti botanici hafniensis is hardy down to USDA zone 3a, 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.

Supplementum Horti botanici hafniensis can be propagated through seeds, division of offsets. Similar propagation techniques also apply to stemless carline thistle plant care, which shares the same genus.

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Supplementum Horti botanici hafniensis is susceptible to aphids, spider mites, whiteflies. 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.

Supplementum Horti botanici hafniensis grows outdoors in USDA Zone 3a – 8b. It survives winters down to planting zone 3a. Supplementum Horti botanici hafniensis is native to Europe, Russia, Kazakhstan and in the Xinjiang region of China.