Northern Linanthus Plant Care

Northern Linanthus (Leptosiphon septentrionalis) belongs to the Polemoniaceae family within the Leptosiphon genus.

Northern Linanthus displays a low rosette, spreading ground cover growth habit, reaching up to 0.5 ft tall with a spread of approximately 1 ft. Northern Linanthus produces small, colorful funnel-shaped flowers in various shades.

Leaf size: approximately 1 inches.

Water a young or newly planted Northern Linanthus every 3–7 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.

Northern Linanthus thrives in full sun to partial shade.

Leptosiphon septentrionalis tolerates temperatures of 50–80°F. Northern Linanthus prefers humidity levels of 40–60%.

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

Feed Northern Linanthus 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 added organic matter for moisture retention. Avoid low spots where water collects after rain.

Northern Linanthus is suited to USDA Zone 12a.

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.

Northern Linanthus 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 Northern Linanthus 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.

Northern Linanthus is frost-tender (hardy to USDA zone 12). In colder areas grow it in a container and move it to a bright, frost-free place before the first frost.

Northern Linanthus can be propagated through seeds, division of clumps. Similar propagation techniques also apply to needle-leaf linanthus plant care, which shares the same genus.

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

Northern Linanthus 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.

Northern Linanthus grows outdoors in USDA Zone 12a. It survives winters down to planting zone 12a. In cooler regions, grow Northern Linanthus as a houseplant or bring it indoors before the first frost.