Triangular eupatorium Plant Care
Eupatoriastrum triangulare B.L.Rob.
Updated · Sources · How we source care data
With its unique triangular-shaped leaves, Eupatoriastrum triangulare originates from the cloud forests of Ecuador. Plant collectors are drawn to its striking foliage and its ability to thrive in humid environments, making it a coveted addition to any tropical plant collection.
Every 7–10 days
Full sun to partial shade
60–75°F
40–60%
At a glance
How do you care for Triangular eupatorium?
Water Triangular eupatorium every 7–10 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 Triangular eupatorium?
Triangular eupatorium (Eupatoriastrum triangulare) belongs to the Asteraceae family within the Eupatoriastrum genus. Triangular eupatorium is native to South America, Brazil, Colombia. Triangular eupatorium is also known as Delta eupatorium.
Triangular eupatorium displays an upright, bushy perennial growth habit, reaching up to 2.5 ft tall with a spread of approximately 1.5 ft. Triangular eupatorium produces small daisy-like flowers in various colors.
Leaf size: approximately 4 inches.
How Often Should You Water a Triangular eupatorium?
Eupatoriastrum triangulare requires watering every 7–10 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 7–10 days
Let soil partially dry between waterings
What Light Does the Triangular eupatorium Need?
Triangular eupatorium thrives in full sun to partial shade.
Light Requirement
Full sun to partial shade
What Temperature and Humidity Does the Triangular eupatorium Prefer?
Eupatoriastrum triangulare grows best at temperatures of 60–75°F. Triangular eupatorium prefers humidity levels of 40–60%.
Temperature
60–75°F
Humidity
40–60%
What Soil Mix Works Best for a Triangular eupatorium?
Well-draining loamy soil with added compost for nutrients. Good drainage is essential for Triangular eupatorium to prevent waterlogging, which leads to root rot and fungal issues.
How Often Should You Fertilize a Triangular eupatorium?
Feed Triangular eupatorium 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 Triangular eupatorium?
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 Triangular eupatorium?
Triangular eupatorium can be propagated through seeds, division of clumps. Similar propagation techniques also apply to black-eyed susan vine plant care, which shares the same genus.
Is the Triangular eupatorium Toxic to Pets and Children?
Pet safety not verified
The ASPCA does not list Triangular eupatorium, 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 Triangular eupatorium?
Triangular eupatorium is susceptible to aphids, whiteflies, spider mites. 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 Triangular eupatorium Need?
Triangular eupatorium grows outdoors in USDA Zone 13a. It survives winters down to planting zone 13a. Triangular eupatorium is native to South America, Brazil, Colombia. In cooler regions, grow Triangular eupatorium as a houseplant or bring it indoors before the first frost.
Hardiness Zone
Zone 13a
Keep exploring plants
Triangular eupatorium 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 Eupatoriastrum genus — compare its care with other Eupatoriastrum species on PlantoScan.
Eupatoriastrum is part of the Asteraceae plant family — browse all Asteraceae genera and species.
Triangular eupatorium 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: Eupatoriastrum triangulare B.L.Rob., family Asteraceae (first published in Contr. Gray Herb. 68: 34 (1923)) — World Flora Online record, IPNI name record.
- Pet toxicity: Pet safety not verified: the ASPCA does not list Triangular eupatorium, 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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