Sea Plantain Plant Care

Sea Plantain (Plantago maritima) belongs to the Plantaginaceae family within the Plantago genus. Sea Plantain is native to most of Europe, northwest Africa, northern and central Asia, northern North America, and southern South America. Sea Plantain is also known as Goose Tongue, Seaside Plantain.

Sea Plantain displays a low rosette, spreading growth habit, reaching up to 0.5 ft tall with a spread of approximately 1 ft. Sea Plantain produces tiny, inconspicuous flowers on slender spikes.

Leaf size: approximately 3 inches.

Water a young or newly planted Sea Plantain 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.

Sea Plantain thrives in full sun to part shade.

Plantago maritima tolerates temperatures of 50–80°F. Sea Plantain prefers humidity levels of 40–70%.

Well-draining loamy soil with good organic content. Good drainage is essential for Sea Plantain to prevent waterlogging, which leads to root rot and fungal issues.

Feed Sea Plantain 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 part shade and well-draining loamy soil with good organic content. Avoid low spots where water collects after rain.

Sea Plantain 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.

Sea Plantain 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 Sea Plantain 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.

Sea Plantain 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.

Sea Plantain can be propagated through seeds, division of clumps. Similar propagation techniques also apply to african plantain plant care, which shares the same genus.

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

Sea Plantain is susceptible to aphids, snails, slugs. 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.

Sea Plantain grows outdoors in USDA Zone 3a – 8b. It survives winters down to planting zone 3a. Sea Plantain is native to most of Europe, northwest Africa, northern and central Asia, northern North America, and southern South America.