Photo: Geichhorn2000CC BY-SA 3.0via Wikimedia Commonsresized / cropped
Spanish Needles Plant Care
Bidens triplinervia Kunth
Updated · Sources · How we source care data
This plant's most distinctive visual feature is its striking triple-veined leaves, giving it a unique and eye-catching appearance. Originating from tropical regions in Central and South America, it is highly sought after by plant collectors for its rarity and beauty, making it a prized addition to any collection.
Every 3–5 days
Full sun to partial shade
60–80°F
40–60%
At a glance
How do you care for Spanish Needles?
Water Spanish Needles every 3–5 days, letting the top layer of soil dry out between waterings, and give it full sun to partial shade. It prefers temperatures of 60–80°F (16–27°C) and 40–60% humidity. Fertilize it every 4 months during the growing season.
Where Is the Spanish Needles Native To?
What Is the Spanish Needles?
Spanish Needles (Bidens triplinervia) belongs to the Asteraceae family within the Bidens genus. Spanish Needles is native to Mesoamerica and South America, from Chihuahua State in northern Mexico to Jujuy Province in northern Argentina. Spanish Needles is also known as Three-veined Bidens, Bidens affinis, Bidens attenuata.
Spanish Needles displays an upright, branching annual growth habit, reaching up to 2 ft tall with a spread of approximately 1.5 ft. Spanish Needles produces small, daisy-like flowers in shades of yellow, orange, or white.
Leaf size: approximately 2 inches.
How Often Should You Water a Spanish Needles?
Bidens triplinervia requires watering every 3–5 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 3–5 days
Let soil partially dry between waterings
What Light Does the Spanish Needles Need?
Spanish Needles thrives in full sun to partial shade.
Light Requirement
Full sun to partial shade
What Temperature and Humidity Does the Spanish Needles Prefer?
Bidens triplinervia grows best at temperatures of 60–80°F. Spanish Needles prefers humidity levels of 40–60%.
Temperature
60–80°F
Humidity
40–60%
What Soil Mix Works Best for a Spanish Needles?
Well-draining soil with high organic content, such as loam or sandy loam. Good drainage is essential for Spanish Needles to prevent waterlogging, which leads to root rot and fungal issues.
How Often Should You Fertilize a Spanish Needles?
Feed Spanish Needles every 4 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 4 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 Spanish Needles?
Annually in 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 Spanish Needles?
Spanish Needles can be propagated through seeds. Similar propagation techniques also apply to spanish needles plant care, which shares the same genus.
Is the Spanish Needles Toxic to Pets and Children?
Pet safety not verified
The ASPCA does not list Spanish Needles, 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 Spanish Needles?
Spanish Needles 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 Spanish Needles Need?
Spanish Needles grows outdoors in USDA Zone 9a – 11b. It survives winters down to planting zone 9a. Spanish Needles is native to Mesoamerica and South America, from Chihuahua State in northern Mexico to Jujuy Province in northern Argentina. In cooler regions, grow Spanish Needles as a houseplant or bring it indoors before the first frost.
Hardiness Zone
Zone 9a – 11b
Keep exploring plants
Spanish Needles 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 Bidens genus — compare its care with other Bidens species on PlantoScan.
Bidens is part of the Asteraceae plant family — browse all Asteraceae genera and species.
Spanish Needles thrives in bright light and direct sun — see other bright-light plants.
More Bidens Species
Other Bidens species in PlantoScan's care catalogue share similar watering, light, and soil preferences:
Sources
- Scientific name & taxonomy: Bidens triplinervia Kunth, family Asteraceae (first published in Nov. Gen. Sp. 4(17): 182 (ed. fol.) (1818)) — World Flora Online record, IPNI name record.
- Pet toxicity: Pet safety not verified: the ASPCA does not list Spanish Needles, 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.
- Photo: Geichhorn2000, CC BY-SA 3.0, Wikimedia Commons — original.
- Hardiness zone: USDA Zone 9a – 11b, estimated from the plant's typical growing conditions.
- 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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