Malanga Plant Care
Cyrtosperma merkusii Schott
Updated · Sources · How we source care data
Cyrtosperma merkusii or giant swamp taro, is a crop grown throughout Oceania and into South and Southeast Asia. It is a riverine and "swamp crop" similar to taro, but "with bigger leaves and larger, coarser roots." There are no demonstrably wild populations today, but it is believed to be native to Indonesia.
Every 7–10 days
Bright indirect light
65–80°F
60–80%
At a glance
How do you care for Malanga?
Water Malanga every 7–10 days, letting the top layer of soil dry out between waterings, and give it bright indirect light. It prefers temperatures of 65–80°F (18–27°C) and 60–80% humidity. Fertilize it every 6 months during the growing season. It is reported as toxic to pets, so keep it out of reach of pets.
Where Is the Malanga Native To?
What Is the Malanga?
Malanga (Cyrtosperma merkusii) belongs to the Araceae family within the Cyrtosperma genus. Malanga is native to Indonesia. Malanga is also known as Swamp Taro, Giant Taro.
Malanga displays a large, clumping perennial growth habit, reaching up to 6 ft tall with a spread of approximately 4 ft. Malanga produces small inconspicuous flowers surrounded by a spathe.
Leaf size: approximately 12 inches.
How Often Should You Water a Malanga?
Cyrtosperma merkusii 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 Malanga Need?
Malanga thrives in bright indirect light. Avoid placing Malanga in direct, harsh sunlight for extended periods, as this can scorch the foliage.
Light Requirement
Bright indirect light
What Temperature and Humidity Does the Malanga Prefer?
Cyrtosperma merkusii grows best at temperatures of 65–80°F. Malanga prefers humidity levels of 60–80%. A pebble tray or humidifier helps maintain adequate moisture around the plant.
Temperature
65–80°F
Humidity
60–80%
What Soil Mix Works Best for a Malanga?
Rich, well-draining soil with high organic content. Good drainage is essential for Malanga to prevent waterlogging, which leads to root rot and fungal issues.
How Often Should You Fertilize a Malanga?
Feed Malanga 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 Malanga?
Repot every 1-2 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 Malanga?
Malanga can be propagated through division of rhizomes, offsets.
Is the Malanga Toxic to Pets and Children?
Toxic (caution)
Reported as toxic in our plant data. Not verified by the ASPCA.
Toxic to humans and pets if ingested
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 Malanga?
Malanga is susceptible to spider mites, aphids, mealybugs. 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 Malanga Need?
Malanga grows outdoors in USDA Zone 13b. It survives winters down to planting zone 13b. Malanga is native to Indonesia. In cooler regions, grow Malanga as a houseplant or bring it indoors before the first frost.
Hardiness Zone
Zone 13b
Keep exploring plants
Malanga 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 Cyrtosperma genus — compare its care with other Cyrtosperma species on PlantoScan.
Cyrtosperma is part of the Araceae plant family — browse all Araceae genera and species.
Malanga 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: Cyrtosperma merkusii Schott, family Araceae (first published in Oesterr. Bot. Wochenbl. 7: 61 (1857)) — World Flora Online record, IPNI name record.
- Pet toxicity: Malanga is reported as toxic to pets in our plant data (not verified by the ASPCA), so treat it with caution. 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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