Filamentous Moss Plant Care
Porothamnium filiferum (Mitt.) M.Fleisch.
Updated · Sources · How we source care data
This plant's unique feature is its long, thread-like leaves that cascade elegantly. Originating from the tropical rainforests of South America, Porothamnium filiferum is sought after by plant collectors for its unusual appearance and ability to thrive in humid environments. Its delicate leaves add a touch of exotic beauty to any indoor garden.
Every 3–7 days
Low to medium indirect light
60–75°F
50–80%
At a glance
How do you care for Filamentous Moss?
Water Filamentous Moss every 3–7 days, letting the top layer of soil dry out between waterings, and give it low to medium indirect light. It prefers temperatures of 60–75°F (16–24°C) and 50–80% humidity. Fertilize it every month during the growing season.
What Is the Filamentous Moss?
Filamentous Moss (Porothamnium filiferum) belongs to the Neckeraceae family within the Porothamnium genus. Filamentous Moss is native to North America, Europe. Filamentous Moss is also known as Thread Moss, Hair Moss.
Filamentous Moss displays a low mat-forming ground cover growth habit, reaching up to tall with a spread of approximately . Filamentous Moss produces tiny inconspicuous flowers.
How Often Should You Water a Filamentous Moss?
Porothamnium filiferum 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.
Watering Frequency
Every 3–7 days
Let soil partially dry between waterings
What Light Does the Filamentous Moss Need?
Filamentous Moss thrives in low to medium indirect light. Avoid placing Filamentous Moss in direct, harsh sunlight for extended periods, as this can scorch the foliage.
Light Requirement
Low to medium indirect light
What Temperature and Humidity Does the Filamentous Moss Prefer?
Porothamnium filiferum grows best at temperatures of 60–75°F. Filamentous Moss prefers humidity levels of 50–80%. A pebble tray or humidifier helps maintain adequate moisture around the plant.
Temperature
60–75°F
Humidity
50–80%
What Soil Mix Works Best for a Filamentous Moss?
Well-draining peat-based soil mix with added perlite for aeration. Good drainage is essential for Filamentous Moss to prevent waterlogging, which leads to root rot and fungal issues.
How Often Should You Fertilize a Filamentous Moss?
Feed Filamentous Moss every month during the growing season (spring and summer) with a balanced fertilizer diluted to the strength on the label.
Pause feeding in autumn and winter, when growth slows, and never fertilize dry soil — water first.
Fertilizing
Every month
During the growing season
The PlantoScan app can remind you when to water and when to fertilize each plant.
How Do You Repot a Filamentous Moss?
Replant every 1-2 years to refresh soil and prevent overcrowding. 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 Filamentous Moss?
Filamentous Moss can be propagated through spores, division of rhizomes. Similar propagation techniques also apply to mossy rockweed plant care, which shares the same genus.
Is the Filamentous Moss Toxic to Pets and Children?
Pet safety not verified
The ASPCA does not list Filamentous Moss, 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 Filamentous Moss?
Filamentous Moss is susceptible to fungal diseases such as powdery mildew. 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
Filamentous Moss 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 Porothamnium genus (family Neckeraceae) — search all Porothamnium species in the plant lookup.
Filamentous Moss copes with lower light than most plants — browse the full list of low-light plants.
Related Plant Care Guides
Closely related plants with similar care requirements:
Sources
- Scientific name & taxonomy: Porothamnium filiferum (Mitt.) M.Fleisch., family Neckeraceae (first published in Nat. Pflanzenfam. (ed. 2) 11: 199 1925) — World Flora Online record.
- Pet toxicity: Pet safety not verified: the ASPCA does not list Filamentous Moss, 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
Filamentous Moss 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