Sea cordgrass Plant Care

Sea cordgrass (Spartina maritima) belongs to the Poaceae family within the Spartina genus. Sea cordgrass is native to the coasts of western and southern Europe and western Africa, from the Netherlands west across southern England to southern Ireland, and south along the Atlantic coast to Morocco and also on the Mediterranean Sea coasts. Sea cordgrass is also known as Mediterranean saltmarsh grass.

Sea cordgrass displays a tall, grassy clumps growth habit, reaching up to 4 ft tall with a spread of approximately 2 ft. Sea cordgrass produces feathery flower spikes in shades of green, brown, or purple.

Leaf size: approximately 12 inches.

Spartina maritima requires watering every 3–7 days. Allow the top layer of soil to dry between waterings to prevent root rot. Reduce watering frequency during winter when growth slows.

Sea cordgrass thrives in full sun to partial shade.

Spartina maritima grows best at temperatures of 50–90°F. Sea cordgrass prefers humidity levels of 40–70%.

Moist, fertile soil with good drainage. Good drainage is essential for Sea cordgrass to prevent waterlogging, which leads to root rot and fungal issues.

Divide clumps every 2-3 years in early spring. Choose a pot one size larger than the current container, and ensure it has drainage holes to allow excess water to escape.

Sea cordgrass can be propagated through division, seed. Similar propagation techniques also apply to smooth cordgrass plant care, which shares the same genus.

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Sea cordgrass is susceptible to aphids, grasshoppers, caterpillars. 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 cordgrass grows outdoors in USDA Zone 12a. It survives winters down to planting zone 12a. Sea cordgrass is native to the coasts of western and southern Europe and western Africa, from the Netherlands west across southern England to southern Ireland, and south along the Atlantic coast to Morocco and also on the Mediterranean Sea coasts. In cooler regions, grow Sea cordgrass as a houseplant or bring it indoors before the first frost.