Threadleaf Itasina Plant Care
Itasina filifolia (Thunb.) Raf.
Updated · Sources · How we source care data
Itasina is a genus of flowering plants belonging to the family Apiaceae. It contains a single species, Itasina filifolia.
Every 5–7 days
Full sun to partial shade
60–75°F
40–60%
At a glance
How do you care for Threadleaf Itasina?
Water Threadleaf Itasina every 5–7 days, letting the top layer of soil dry out between waterings, and give it full sun to partial shade. It prefers temperatures of 60–75°F (16–24°C) and 40–60% humidity. Fertilize it every 6 months during the growing season.
What Is the Threadleaf Itasina?
Threadleaf Itasina (Itasina filifolia) belongs to the Apiaceae family within the Itasina genus.
Threadleaf Itasina displays a tall, upright herbaceous perennial growth habit, reaching up to 3 ft tall with a spread of approximately 2 ft. Threadleaf Itasina produces small clusters of white or pink umbels.
Leaf size: approximately 8 inches.
How Often Should You Water a Threadleaf Itasina?
Itasina filifolia requires watering every 5–7 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 5–7 days
Let soil partially dry between waterings
What Light Does the Threadleaf Itasina Need?
Threadleaf Itasina thrives in full sun to partial shade.
Light Requirement
Full sun to partial shade
What Temperature and Humidity Does the Threadleaf Itasina Prefer?
Itasina filifolia grows best at temperatures of 60–75°F. Threadleaf Itasina prefers humidity levels of 40–60%.
Temperature
60–75°F
Humidity
40–60%
What Soil Mix Works Best for a Threadleaf Itasina?
Rich, well-draining loamy soil with added compost for nutrients. Good drainage is essential for Threadleaf Itasina to prevent waterlogging, which leads to root rot and fungal issues.
How Often Should You Fertilize a Threadleaf Itasina?
Feed Threadleaf Itasina every 6 months 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 6 months
During the growing season
The PlantoScan app can remind you when to water and when to fertilize each plant.
How Do You Repot a Threadleaf Itasina?
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 Threadleaf Itasina?
Threadleaf Itasina can be propagated through seeds, division of root ball.
Is the Threadleaf Itasina Toxic to Pets and Children?
Pet safety not verified
The ASPCA does not list Threadleaf Itasina, 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 Threadleaf Itasina?
Threadleaf Itasina is susceptible to aphids, spider mites, whiteflies. 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 Threadleaf Itasina Need?
Threadleaf Itasina grows outdoors in USDA Zone 13a. It survives winters down to planting zone 13a. In cooler regions, grow Threadleaf Itasina as a houseplant or bring it indoors before the first frost.
Hardiness Zone
Zone 13a
Keep exploring plants
Threadleaf Itasina 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 Itasina genus — compare its care with other Itasina species on PlantoScan.
Itasina is part of the Apiaceae plant family — browse all Apiaceae genera and species.
Threadleaf Itasina 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: Itasina filifolia (Thunb.) Raf., family Apiaceae (first published in Good Book : 51 (1840)) — World Flora Online record, IPNI name record.
- Pet toxicity: Pet safety not verified: the ASPCA does not list Threadleaf Itasina, 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 13a, 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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