Cape forget-me-not Plant Care

Cape forget-me-not (Kohautia amatymbica) belongs to the Rubiaceae family within the Kohautia genus. Cape forget-me-not is native to southern Africa. Cape forget-me-not is also known as Blue stars.

Cape forget-me-not displays a compact, mounding shrub growth habit, reaching up to 2.5 ft tall with a spread of approximately 3 ft. Cape forget-me-not produces small, star-shaped white flowers in clusters.

Leaf size: approximately 3 inches.

Water a young or newly planted Cape forget-me-not 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.

Cape forget-me-not thrives in bright indirect light. Avoid placing Cape forget-me-not in direct, harsh sunlight for extended periods, as this can scorch the foliage.

Kohautia amatymbica tolerates temperatures of 65–80°F. Cape forget-me-not prefers humidity levels of 50–70%. A pebble tray or humidifier helps maintain adequate moisture around the plant.

Well-draining, slightly acidic soil with high organic matter content. Good drainage is essential for Cape forget-me-not to prevent waterlogging, which leads to root rot and fungal issues.

Feed Cape forget-me-not 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 bright indirect light and well-draining, slightly acidic soil with high organic matter content. Avoid low spots where water collects after rain.

Cape forget-me-not is suited to USDA Zone 8b – 10b.

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.

Cape forget-me-not 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 Cape forget-me-not 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.

Cape forget-me-not is hardy down to USDA zone 8b, 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.

Cape forget-me-not can be propagated through seeds, stem cuttings. Similar propagation techniques also apply to socotran kohautia plant care, which shares the same genus.

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

Cape forget-me-not 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.

Cape forget-me-not grows outdoors in USDA Zone 8b – 10b. It survives winters down to planting zone 8b. Cape forget-me-not is native to southern Africa.