Alocasia longiloba ‘Dragon’s Tooth’

Natural range of Alocasia longiloba

‘Dragon’s Tooth’ belongs to the variable Alocasia longiloba group. The species ranges from mainland Southeast Asia into the western and central Malay Archipelago. It grows on humid forest floors, in damp ravines and in pockets of soil among boulders and cliffs.

Caring for Alocasia longiloba ‘Dragon’s Tooth’

• Light: Give it bright, diffuse light and introduce only mild morning sun gradually. Strong sun through glass can mark a long new blade before it has hardened.
• Humidity: Maintain relative humidity around 60–80%. Consistent conditions are especially helpful as a new leaf opens.
• Watering: Water when the surface begins drying and the root zone below remains lightly moist. Saturate the substrate evenly and let it drain fully.
• Airflow: Provide gentle circulation around the leaves and across the substrate surface.
• Temperature: Keep the plant at about 20–28°C and protect the pot from cold windowsills and draughts.
• Substrate: Combine coco fibre or peat with bark and pumice or perlite for a mix that is both open and moisture-retentive.
• Feeding: Use a dilute complete fertiliser during active growth.
• Growth slowdowns: If growth slows, check warmth, light, root-zone moisture and root condition. Match watering to current uptake and reduce fertiliser, then resume regular feeding with new root or leaf activity.
• Repotting: Select a snug pot with good drainage and keep the elongated rhizome at its established level. Give emerging growth enough clear room to open naturally.
• Propagation: Propagate from a rooted corm, offset or firm, healthy rhizome section with its own growth point during warm active growth.
• 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.

Problems and solutions for Alocasia longiloba ‘Dragon’s Tooth’

• A new leaf opens with silver scars, black specks or repeated buckling: Inspect folded growth, the growing point and undersides for thrips. Isolate and rinse or wipe accessible insects. If live thrips or fresh scars continue, use one locally registered product whose label lists thrips and indoor ornamentals. Test a small inconspicuous area first, then follow the label's instructions for protective equipment, ventilation, dilution, coverage, repeat intervals and maximum applications. Recheck the growing point and each newly opening leaf. If a badly infested leaf must be removed, wear gloves and avoid sap contact with skin and eyes before cutting, then wash hands and clean tools.
• Fine stippling, bronzing or webbing develops on the lower surface: Confirm mites or eggs with good light or magnification. Isolate, rinse both surfaces and sheltered junctions, reduce dust and repeat washing while checking later growth. If live mites or fresh damage remain, use one locally registered product whose label lists spider mites and indoor ornamentals. Test a small inconspicuous area first, then follow the label's instructions for protective equipment, ventilation, dilution, coverage, repeat intervals and maximum applications. Keep wet treated foliage out of direct sun and recheck undersides and sheltered junctions.
• An exposed-side area becomes pale or tan after stronger light: Move the plant out of hot direct sun while retaining bright indirect light, stabilise heat and check for genuine root-ball dryness. Water thoroughly and drain only when needed, acclimatise future light changes gradually and assess unaffected new tissue.
• Wilt persists or the base softens above damp medium: Stop watering, empty standing water and check drainage, cold, light and feeding. Before unpotting, wear gloves and avoid sap contact with skin and eyes; keep all firm roots and remove only directly confirmed dark, mushy, hollow or collapsing portions. Use a clean draining pot and fresh airy medium, then wash hands and clean tools. A spreading soft base requires isolation and professional diagnosis before further cutting.

Alocasia longiloba ‘Dragon’s Tooth’: 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.

What longiloba means in Dragon’s Tooth

The epithet longiloba combines Latin longus, “long”, and lobus, “lobe”, referring to the elongated leaf lobes.

Friedrich Anton Wilhelm Miquel described Alocasia longiloba in 1856 in Flora van Nederlandsch Indië, volume 3, page 207.