Thread-leaved Sundew Plant Care
Drosera filiformis Raf.
Updated · Sources · How we source care data
Drosera filiformis, commonly known as Tracy's sundew, dewthread or the thread-leaved sundew, is a small, insectivorous, rosette-forming species of perennial herb. A species of sundew, it is unusual within its genus in that the long, erect, filiform (thread-like) leaves of this plant unroll in spirals – an arrangement similar to the circinate vernation seen in ferns.
Full sun to partial shade
At a glance
How do you care for Thread-leaved Sundew?
Thread-leaved Sundew grows best in full sun to partial shade.
What Is the Thread-leaved Sundew?
Thread-leaved Sundew (Drosera filiformis) belongs to the Droseraceae family within the Drosera genus. Thread-leaved Sundew is also known as Thread Sundew, Fine-leaved Sundew.
Thread-leaved Sundew displays a low rosette, clumping habit growth habit, reaching up to tall with a spread of approximately . Thread-leaved Sundew produces small, delicate white or pink flowers on tall stalks.
What Light Does the Thread-leaved Sundew Need?
Thread-leaved Sundew thrives in full sun to partial shade.
Light Requirement
Full sun to partial shade
What Soil Mix Works Best for a Thread-leaved Sundew?
Nutrient-poor, acidic soil with high organic matter content like sphagnum moss and perlite. Good drainage is essential for Thread-leaved Sundew to prevent waterlogging, which leads to root rot and fungal issues.
How Do You Repot a Thread-leaved Sundew?
Repot every 1-2 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 Thread-leaved Sundew?
Thread-leaved Sundew can be propagated through leaf cuttings, division, seeds. Similar propagation techniques also apply to cape sundew plant care, which shares the same genus.
Is the Thread-leaved Sundew Toxic to Pets and Children?
Pet safety not verified
The ASPCA does not list Thread-leaved Sundew, 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 Thread-leaved Sundew?
Thread-leaved Sundew is susceptible to aphids, spider mites, fungus gnats. 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
Thread-leaved Sundew 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 Drosera genus — compare its care with other Drosera species on PlantoScan.
Drosera is part of the Droseraceae plant family — browse all Droseraceae genera and species.
Thread-leaved Sundew thrives in bright light and direct sun — see other bright-light plants.
More Drosera Species
Other Drosera species in PlantoScan's care catalogue share similar watering, light, and soil preferences:
Sources
- Scientific name & taxonomy: Drosera filiformis Raf., family Droseraceae (first published in Med. Repos. , ser. 2, 5: 360 (1808)) — World Flora Online record, IPNI name record.
- Pet toxicity: Pet safety not verified: the ASPCA does not list Thread-leaved Sundew, 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
Thread-leaved Sundew 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