Photo: Pablo SilvaCC BY 4.0via iNaturalistresized / cropped
Chilean pipe cactus Plant Care
Eulychnia castanea Phil.
Updated · Sources · How we source care data
Native to Chile, this plant is known for its unique cylindrical shape and impressive spines that cover its body. Plant collectors are drawn to the Eulychnia castanea for its striking appearance and rarity in cultivation, making it a coveted addition to any collection.
Every 14–21 days
Full sun
50–90°F
10–40%
At a glance
How do you care for Chilean pipe cactus?
Water Chilean pipe cactus every 14–21 days, letting the top layer of soil dry out between waterings, and give it full sun. It prefers temperatures of 50–90°F (10–32°C) and 10–40% humidity. Fertilize it every 8 months during the growing season.
Where Is the Chilean pipe cactus Native To?
What Is the Chilean pipe cactus?
Chilean pipe cactus (Eulychnia castanea) belongs to the Cactaceae family within the Eulychnia genus. Chilean pipe cactus is native to Chile. Chilean pipe cactus is also known as Copao.
Chilean pipe cactus displays a columnar cactus growth habit, reaching up to 10 ft tall with a spread of approximately 2 ft. Chilean pipe cactus produces large white nocturnal blooms.
Leaf size: approximately 5 inches.
How Often Should You Water a Chilean pipe cactus?
Eulychnia castanea requires watering every 14–21 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 14–21 days
Let soil partially dry between waterings
What Light Does the Chilean pipe cactus Need?
Chilean pipe cactus thrives in full sun.
Light Requirement
Full sun
What Temperature and Humidity Does the Chilean pipe cactus Prefer?
Eulychnia castanea grows best at temperatures of 50–90°F. Chilean pipe cactus prefers humidity levels of 10–40%.
Temperature
50–90°F
Humidity
10–40%
What Soil Mix Works Best for a Chilean pipe cactus?
Sandy, well-draining cactus mix with perlite and coarse sand. Good drainage is essential for Chilean pipe cactus to prevent waterlogging, which leads to root rot and fungal issues.
How Often Should You Fertilize a Chilean pipe cactus?
Feed Chilean pipe cactus every 8 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 8 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 Chilean pipe cactus?
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 Chilean pipe cactus?
Chilean pipe cactus can be propagated through seeds, offsets, stem cuttings. Similar propagation techniques also apply to chilean torch plant care, which shares the same genus.
Is the Chilean pipe cactus Toxic to Pets and Children?
Pet safety not verified
The ASPCA does not list Chilean pipe cactus, 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 Chilean pipe cactus?
Chilean pipe cactus is susceptible to scale insects, mealybugs, 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 Chilean pipe cactus Need?
Chilean pipe cactus grows outdoors in USDA Zone 9b – 11b. It survives winters down to planting zone 9b. Chilean pipe cactus is native to Chile. In cooler regions, grow Chilean pipe cactus as a houseplant or bring it indoors before the first frost.
Hardiness Zone
Zone 9b – 11b
Keep exploring plants
Chilean pipe cactus 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 Eulychnia genus — compare its care with other Eulychnia species on PlantoScan.
Eulychnia is part of the Cactaceae plant family — browse all Cactaceae genera and species.
Chilean pipe cactus 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: Eulychnia castanea Phil., family Cactaceae (first published in in Linnaea 33: 80. 1864.) — World Flora Online record.
- Pet toxicity: Pet safety not verified: the ASPCA does not list Chilean pipe cactus, 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: Pablo Silva, CC BY 4.0, iNaturalist — original.
- Hardiness zone: USDA Zone 9b – 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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