Alocasia macrorrhizos ‘Variegata’

Natural range of Alocasia macrorrhizos

Alocasia macrorrhizos ‘Variegata’ is a white-variegated form of Alocasia macrorrhizos. The species occurs naturally from the central Malay Archipelago east through New Guinea and the western Pacific, reaching northern Queensland. These are warm regions with generous rainfall. Indoors, choose a large, deep pot with an airy mix, provide very bright indirect light and water regularly during active growth.

Alocasia macrorrhizos ‘Variegata’ care guide

• Light: Give it very bright, diffuse light and acclimate it slowly to any gentle morning or late-afternoon sun. Protect white and cream sections from intense rays.
• Watering: Water when the upper few centimetres have partly dried and the deeper root ball remains lightly moist. Saturate evenly, drain fully and check the centre of a large container before watering again.
• Humidity: Maintain relative humidity around 60–80% to support broad new leaves as they open.
• Airflow: Provide gentle circulation and protect pale areas from hot, dry airflow.
• Temperature: Keep the plant at about 20–30°C with a warm root zone.
• Substrate: Use a rich, open blend of coco fibre or peat, bark and pumice or perlite. The mix should hold steady moisture and drain freely after irrigation.
• Feeding: Apply a dilute complete fertiliser with micronutrients during active growth. Reduce the dose as growth slows and rinse accumulated salts from the mix periodically.
• Repotting: Use a heavy, stable pot with generous drainage, increasing its size only after roots fill the current container. Keep the thick stem at the same depth.
• Propagation: Divide a rooted basal shoot or corm containing enough green tissue to support new growth together with visible variegation. Establish it in warmth, humidity and an evenly moist, aerated mix.

Common issues with Alocasia macrorrhizos ‘Variegata’

• The colour pattern changes after the leaf opensHealthy variegation is present as the leaf unfurls and remains firm as it hardens. A broad colour change through previously green tissue, especially with drooping or stalled growth, points to a whole-plant issue. Check the root ball, roots and recent temperature changes before reaching for fertiliser.
• New growth is greener than earlier leavesVariegation can vary from leaf to leaf. Assess several successive leaves and keep the plant in bright, filtered light to support the green tissue. Cutting or dividing the plant makes sense only when a repeated change can be traced to a clearly identified growth point.
• Stippling crosses the natural patternSpider mites produce fine pinprick fading or bronzing that cuts across the plant’s established markings and may add webbing beneath the blade. Inspect the lower surfaces and veins with magnification. Isolate the plant, rinse the foliage and complete a treatment labelled for mites.
• Drooping continues in moist substrateInspect the roots and lower stem before adding water. Remove soft or collapsing roots with clean tools, clean the pot and repot the firm root system into fresh, aerated substrate. Select the container according to the roots that remain, even if the foliage is already large.

Alocasia macrorrhizos ‘Variegata’ is toxic to people and pets

• Keep this plant away from children, cats and dogs.
• Its leaves and stems contain insoluble calcium oxalate crystals, which can irritate the mouth, throat, skin and eyes.
• Chewing may cause burning pain, drooling, swelling, vomiting or difficulty swallowing. Contact a veterinarian or medical professional after exposure, especially if swelling or breathing problems occur.

About the name Alocasia macrorrhizos

Alocasia combines the Greek prefix a-, meaning “without” or “lacking”, with Colocasia, the name of a related aroid genus. Macrorrhizos means “large-rooted”, from Greek makros, “large”, and rhiza, “root”.

The formal botanical citation is Alocasia (Schott) G.Don. George Don established the genus at that rank in 1839 in Hortus Britannicus, edition 3, page 631.

Carl Linnaeus first described it as Arum macrorrhizon in 1753 in Species Plantarum, page 965. George Don later placed it in Alocasia as Alocasia macrorrhizos in 1839 in Hortus Britannicus, edition 3, page 631.