Alocasia longiloba is part of the Araceae family and its native range is is China (S. Yunnan, Guangdong) to W. & Central Malesia where it grows as a subshrub primarily in the wet tropical biome. It has large, arrow-shaped leaves with deep purple undersides and lobed edges.
Genus name comes from the Greek ‘a’ meaning without and ‘locasia’ meaning lotus root. Longiloba refers to the plant's long lobes on its leaves.
Light: Alocasia longiloba 'Purple' thrives in bright, indirect light. Strong, direct sunlight can scorch its leaves, while insufficient light may result in slower growth and less vibrant coloration, especially diminishing the purple hues. A position near a window with filtered light in a typical UK home is ideal.
Water: The potting mix should be kept consistently moist but not saturated. Allow the upper inch or two of the soil to dry between waterings. Ensure the pot has excellent drainage to prevent root issues, which can be a common problem, especially in the UK's climate. Reduce watering in autumn and winter when the plant's growth naturally slows or it enters dormancy.
Soil: An airy and well-draining potting mix is essential. A mix specifically formulated for aroids, incorporating materials such as coco coir, perlite, and orchid bark, is often recommended to provide the necessary aeration and drainage.
Fertilising: Use a diluted liquid fertiliser every two to four weeks during the active growing period in spring and summer. Reduce or stop fertilising during the autumn and winter months.
Temperature: This plant prefers warm temperatures, ideally between 18°C and 27°C. It should be shielded from cold draughts and sudden temperature changes, which can occur indoors, particularly during colder UK months.
Humidity: Higher humidity levels are highly beneficial for Alocasia longiloba 'Purple'. Consider using a humidifier, pebble tray, or placing it in a naturally humid room to maintain optimal conditions, particularly during drier indoor periods in the UK.
Growth Habit: This Alocasia typically has an upright, clumping growth habit, with new leaves emerging from a central rhizome or corm. It can attain a moderate size indoors.
Toxicity: Like all Alocasias, this plant is toxic if ingested by humans or pets.