Calamus calospathus Plant Care
Calamus calospathus (Ridl.) W.J.Baker & J.Dransf.
Updated · Sources · How we source care data
Calamus calospathus is a rare species of flowering plant in the palm family found in peninsular Malaysia, where it is referred to as rotan demuk. It is not common in collections, nor has it been found in the wild for several years, leading some to conclude that the species may have become extinct.
Every 7–14 days
Bright indirect light
65–85°F
50–70%
At a glance
How do you care for Calamus calospathus?
Water Calamus calospathus every 7–14 days, letting the top layer of soil dry out between waterings, and give it bright indirect light. It prefers temperatures of 65–85°F (18–29°C) and 50–70% humidity. Fertilize it every 6 months during the growing season.
Where Is the Calamus calospathus Native To?
What Is the Calamus calospathus?
Calamus calospathus (Calamus calospathus) belongs to the Arecaceae family within the Calamus genus. Calamus calospathus is native to peninsular Malaysia.
Calamus calospathus displays a tall climbing vine growth habit, reaching up to 10 ft tall with a spread of approximately 3 ft. Calamus calospathus produces small inconspicuous flowers on a large inflorescence.
Leaf size: approximately 18 inches.
How Often Should You Water a Calamus calospathus?
Calamus calospathus requires watering every 7–14 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 7–14 days
Let soil partially dry between waterings
What Light Does the Calamus calospathus Need?
Calamus calospathus thrives in bright indirect light. Avoid placing Calamus calospathus in direct, harsh sunlight for extended periods, as this can scorch the foliage.
Light Requirement
Bright indirect light
What Temperature and Humidity Does the Calamus calospathus Prefer?
Calamus calospathus grows best at temperatures of 65–85°F. Calamus calospathus prefers humidity levels of 50–70%. A pebble tray or humidifier helps maintain adequate moisture around the plant.
Temperature
65–85°F
Humidity
50–70%
What Soil Mix Works Best for a Calamus calospathus?
Rich, well-draining soil with added organic matter like compost or peat moss. Good drainage is essential for Calamus calospathus to prevent waterlogging, which leads to root rot and fungal issues.
How Often Should You Fertilize a Calamus calospathus?
Feed Calamus calospathus 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 Calamus calospathus?
Repot every 2-3 years 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 Calamus calospathus?
Calamus calospathus can be propagated through seeds, division of offsets. Similar propagation techniques also apply to rattan plant care, which shares the same genus.
Is the Calamus calospathus Toxic to Pets and Children?
Pet safety not verified
The ASPCA does not list Calamus calospathus, 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 Calamus calospathus?
Calamus calospathus is susceptible to spider mites, mealybugs, scale insects. 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 Calamus calospathus Need?
Calamus calospathus grows outdoors in USDA Zone 13b. It survives winters down to planting zone 13b. Calamus calospathus is native to peninsular Malaysia. In cooler regions, grow Calamus calospathus as a houseplant or bring it indoors before the first frost.
Hardiness Zone
Zone 13b
Keep exploring plants
Calamus calospathus 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 Calamus genus — compare its care with other Calamus species on PlantoScan.
Calamus is part of the Arecaceae plant family — browse all Arecaceae genera and species.
Calamus calospathus thrives in bright light and direct sun — see other bright-light plants.
More Calamus Species
Other Calamus species in PlantoScan's care catalogue share similar watering, light, and soil preferences:
Sources
- Scientific name & taxonomy: Calamus calospathus (Ridl.) W.J.Baker & J.Dransf., family Arecaceae (first published in Kew Bull. 63: 161 (2008)) — World Flora Online record, IPNI name record.
- Pet toxicity: Pet safety not verified: the ASPCA does not list Calamus calospathus, 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 13b, 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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