Alocasia azlanii

Natural habitat of Alocasia azlanii

Alocasia azlanii comes from Tutong District in Brunei, where it grows beside shallow rainforest streams in moist, sandy clay just above flood level.

The roots stay moist, and excess water moves through the sandy clay.

What Alocasia azlanii needs for healthy growth

• Light: Provide moderate to bright filtered light. Increase light gradually and shield the foliage from direct sun.
• Temperature: Maintain 20–28°C and provide the steady root-zone warmth suited to this lowland species.
• Humidity: Aim for 70–90% humidity. Stable high humidity suits this warm lowland species.
• Watering: Keep the root zone evenly moist and let excess water drain promptly. Water again as the surface begins to feel less damp.
• Repotting: Choose a small, close-fitting and slightly deeper pot; repot once roots fill the container or drainage slows, moving up by one modest size.
• Substrate: Use a moisture-retentive organic mix with ample coarse material to keep air around the roots.
• Feeding: Apply a restrained dose of complete fertiliser during visible growth; reduce applications as light or growth declines.
• Propagation: Propagate through offsets, cormels or rhizome division in stable warmth.
• Handling safety: Before repotting or unpotting, disturbing the root ball, cutting, pruning, division or propagation, wear gloves and keep Alocasia sap away from skin and eyes. After handling, wash hands and clean tools.

Troubleshooting Alocasia azlanii

• Coppery-purple foliage remains firm: A dark metallic cast is healthy and needs no action while the colour and tissue remain stable.
• Bleached patches, brown edges or inward curling appear while tissue stays firm: Move exposed-side bleaching into bright filtered light and acclimatise future increases gradually. Check genuine dryness, humidity changes, mineral crust and heavy feeding. Water thoroughly and drain only when dry and firm at the base; flush salts only with firm roots and free drainage. Existing damage remains, so judge clean later growth.
• Yellowing or wilt develops: Check moisture at root depth. Water thoroughly and drain only when genuinely dry and the base is firm; if wet, stop watering and empty standing water. If decline persists, wear gloves and keep sap away from skin and eyes before unpotting; after handling, wash hands and clean tools. Retain all firm pale or tan roots, remove only directly confirmed dark, mushy, hollow, slimy or collapsing tissue with disinfected tools, and repot into fresh airy medium in a clean draining pot fitted to the surviving roots. Seek professional diagnosis before cutting if the base or crown is soft or the live-tissue boundary is unclear.
• The surface dulls and develops fine pale points: Inspect the underside and veins for mites, eggs or webbing. Isolate the plant, rinse both surfaces and, if live mites or new damage remain, use a product labelled for spider mites and indoor ornamentals at the label interval.
• Tissue becomes soft, water-soaked or larger: Isolate the plant, keep foliage dry and stop splash transfer. If a severely affected leaf requires removal, wear gloves and keep sap away from skin and eyes before cutting it with a disinfected tool, then wash hands and clean tools. Rapid, recurrent or crownward spread needs professional diagnosis before further cutting.

Alocasia azlanii: toxic if chewed

• Pets: This Alocasia is toxic to cats and dogs. Keep the plant and any cut pieces where pets cannot chew them.
• Children and handling: Keep it out of reach of children. Sap from damaged tissue can irritate skin and eyes, so wash your hands after pruning and avoid touching your face.
• Why it irritates: Alocasia tissue contains insoluble calcium oxalate crystals. Chewing or contact with sensitive tissue can cause immediate local irritation.
• Possible symptoms: Mouth exposure can cause burning pain, drooling, swelling, nausea or vomiting, and difficulty swallowing.
• After exposure: For a pet, contact a veterinarian. For a person, remove any plant material from the mouth and rinse with water; seek medical or poison-control advice if symptoms are significant. Breathing difficulty or rapidly increasing swelling needs urgent medical attention.

Who azlanii honours

The epithet azlanii commemorates Azlan Pandai of the Brunei National Herbarium. Khoon Meng Wong and Peter Charles Boyce first described Alocasia azlanii in 2016 in Acta Phytotaxonomica et Geobotanica, volume 67, page 185.