Sea Arrowgrass Plant Care
Triglochin maritima L.
Updated · Sources · How we source care data
Triglochin maritima is a species of flowering plant in the arrowgrass family Juncaginaceae. It is found in brackish marshes, freshwater marshes, wet sandy beaches, fens, damp grassland and bogs.
Full sun to part shade
At a glance
How do you care for Sea Arrowgrass?
Sea Arrowgrass grows best in full sun to part shade.
What Is the Sea Arrowgrass?
Sea Arrowgrass (Triglochin maritima) belongs to the Juncaginaceae family within the Triglochin genus. Sea Arrowgrass is native to brackish marshes, freshwater marshes, wet sandy beaches, fens, damp grassland and bogs. Sea Arrowgrass is also known as Arrowgrass, Saltmarsh Arrowgrass.
Sea Arrowgrass displays a clumping, aquatic perennial growth habit, reaching up to tall with a spread of approximately . Sea Arrowgrass produces small greenish-white flowers in dense spikes.
What Light Does the Sea Arrowgrass Need?
Sea Arrowgrass thrives in full sun to part shade.
Light Requirement
Full sun to part shade
What Soil Mix Works Best for a Sea Arrowgrass?
Moist, acidic soil with high organic content. Good drainage is essential for Sea Arrowgrass to prevent waterlogging, which leads to root rot and fungal issues.
How Do You Repot a Sea Arrowgrass?
Repot 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.
How Do You Propagate a Sea Arrowgrass?
Sea Arrowgrass can be propagated through seeds, division of rhizomes. Similar propagation techniques also apply to gaspé arrowgrass plant care, which shares the same genus.
Is the Sea Arrowgrass Toxic to Pets and Children?
Pet safety not verified
The ASPCA does not list Sea Arrowgrass, so we can't confirm whether it is safe for cats and dogs. Keep pets from chewing it as a precaution.
This is a general caution, not veterinary or medical advice. If your pet ate a plant, contact your vet or animal poison control.
See all plants toxic to cats and plants toxic to dogs.
What Pests and Diseases Affect the Sea Arrowgrass?
Sea Arrowgrass is susceptible to no common pests known. 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.
Keep exploring plants
Sea Arrowgrass is one of many species covered in the complete plant care and identification guide, which groups plants by genus, attribute, and popularity.
It belongs to the Triglochin genus — compare its care with other Triglochin species on PlantoScan.
Triglochin is part of the Juncaginaceae plant family — browse all Juncaginaceae genera and species.
Sea Arrowgrass thrives in bright light and direct sun — see other bright-light plants.
More Triglochin Species
Other Triglochin species in PlantoScan's care catalogue share similar watering, light, and soil preferences:
Sources
- Scientific name & taxonomy: Triglochin maritima L., family Juncaginaceae (first published in Sp. Pl. : 105 (1753)) — World Flora Online record, IPNI name record.
- Pet toxicity: Pet safety not verified: the ASPCA does not list Sea Arrowgrass, so we can't confirm whether it is safe for cats and dogs. Checked against the ASPCA plant list; any other toxicity note on this page comes from PlantoScan's plant database.
- Care values(watering, light, temperature, humidity, soil, fertilizing): PlantoScan's plant database, filtered by automatic plausibility checks — values that fail them are hidden. How we source and check plant data.
Spotted a mistake? Email info@upvision.media with the page link — we check and correct reported errors.
Identify Plants Like the
Sea Arrowgrass Instantly
Scan any plant with your phone camera and get instant ID, care tips, water and fertilizer reminders, and health checks — all in one app.
Free
to download
iOS & Android
platforms
Light & dark
mode
100,000+
species