Sea Fern Grass Plant Care
Catapodium marinum (L.) C.E.Hubb.
Updated · Sources · How we source care data
Catapodium marinum, the sea fern grass, is a species of annual herb in the family Poaceae. They have a self-supporting growth form and simple, broad leaves.
Every 7–14 days
Full sun to partial shade
50–85°F
40–70%
At a glance
How do you care for Sea Fern Grass?
Water Sea Fern Grass every 7–14 days, letting the top layer of soil dry out between waterings, and give it full sun to partial shade. It prefers temperatures of 50–85°F (10–29°C) and 40–70% humidity.
What Is the Sea Fern Grass?
Sea Fern Grass (Catapodium marinum) belongs to the Poaceae family within the Catapodium genus. Sea Fern Grass is also known as Sea Fern-grass.
Sea Fern Grass displays a low tufted grass growth habit, reaching up to 0.5 ft tall with a spread of approximately 0.5 ft. Sea Fern Grass produces small inconspicuous flowers in spikelets.
Leaf size: approximately 6 inches.
How Often Should You Water a Sea Fern Grass?
Catapodium marinum requires watering every 7–14 days. Allow the top layer of soil to dry between waterings to prevent root rot. Reduce watering frequency during winter when growth slows.
Watering Frequency
Every 7–14 days
Let soil partially dry between waterings
What Light Does the Sea Fern Grass Need?
Sea Fern Grass thrives in full sun to partial shade.
Light Requirement
Full sun to partial shade
What Temperature and Humidity Does the Sea Fern Grass Prefer?
Catapodium marinum grows best at temperatures of 50–85°F. Sea Fern Grass prefers humidity levels of 40–70%.
Temperature
50–85°F
Humidity
40–70%
What Soil Mix Works Best for a Sea Fern Grass?
Well-draining sandy loam with moderate fertility. Good drainage is essential for Sea Fern Grass to prevent waterlogging, which leads to root rot and fungal issues.
How Do You Repot a Sea Fern Grass?
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 Fern Grass?
Sea Fern Grass can be propagated through seeds.
Is the Sea Fern Grass Toxic to Pets and Children?
Pet safety not verified
The ASPCA does not list Sea Fern Grass, 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 Fern Grass?
Sea Fern Grass is susceptible to aphids, grasshoppers, cutworms. 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.
What USDA Hardiness Zone Does the Sea Fern Grass Need?
Sea Fern Grass grows outdoors in USDA Zone 12a. It survives winters down to planting zone 12a. In cooler regions, grow Sea Fern Grass as a houseplant or bring it indoors before the first frost.
Hardiness Zone
Zone 12a
Keep exploring plants
Sea Fern Grass 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 Catapodium genus (family Poaceae) — search all Catapodium species in the plant lookup.
Sea Fern Grass thrives in bright light and direct sun — see other bright-light plants.
Related Plant Care Guides
Closely related plants with similar care requirements:
Sources
- Scientific name & taxonomy: Catapodium marinum (L.) C.E.Hubb., family Poaceae (first published in Kew Bull. 9: 375 (1954)) — World Flora Online record, IPNI name record.
- Pet toxicity: Pet safety not verified: the ASPCA does not list Sea Fern Grass, 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.
- Hardiness zone: USDA Zone 12a, calculated from the plant's minimum temperature.
- 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.
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