Asperula rupicola Plant Care

Asperula rupicola (Asperula rupicola) belongs to the Rubiaceae family within the Asperula genus. Asperula rupicola is native to France and Italy.

Asperula rupicola displays a low-growing, spreading ground cover growth habit, reaching up to 0.5 ft tall with a spread of approximately 1 ft. Asperula rupicola produces small, fragrant white or blue star-shaped flowers in clusters.

Leaf size: approximately 1.5 inches.

Water a young or newly planted Asperula rupicola 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.

Asperula rupicola thrives in partial shade to full shade. The optimal light range is 100–500 lux. Avoid placing Asperula rupicola in direct, harsh sunlight for extended periods, as this can scorch the foliage.

Asperula rupicola tolerates temperatures of 60–75°F. Asperula rupicola prefers humidity levels of 40–60%.

Well-draining, slightly acidic soil with added organic matter like compost or peat moss. Good drainage is essential for Asperula rupicola to prevent waterlogging, which leads to root rot and fungal issues.

Feed Asperula rupicola 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 full shade and well-draining, slightly acidic soil with added organic matter like compost or peat moss. Avoid low spots where water collects after rain.

Asperula rupicola is suited to USDA Zone 7a – 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.

Asperula rupicola 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 Asperula rupicola 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.

Asperula rupicola is hardy down to USDA zone 7a, 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.

Asperula rupicola can be propagated through seeds, division of clumps, stem cuttings. Similar propagation techniques also apply to italian woodruff plant care, which shares the same genus.

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

Asperula rupicola 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.

Asperula rupicola grows outdoors in USDA Zone 7a – 9b. It survives winters down to planting zone 7a. Asperula rupicola is native to France and Italy.