Alocasia Care: Types, Dormancy and Propagation

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Alocasia is a tropical plant with huge, sculpted arrow- or heart-shaped leaves. Dark glossy leaves with pale veins, velvety “dragon scales”, striped stems — alocasias have become some of the most popular collector plants. They also have attitude: they can suddenly drop leaves or go dormant for winter. Here is how to care for alocasia so it thrives rather than just survives.

Popular alocasia types

Alocasia is a genus of the arum family from tropical Asia and Australia, related to colocasia and xanthosoma. The most common in shops are:

• Alocasia Polly (A. × amazonica 'Polly') — compact, dark-green arrow-shaped leaves with white veins.
• Zebrina (A. zebrina) — pale leaves on zebra-striped stems.
• Frydek (A. micholitziana 'Frydek') — velvety dark-green leaves with bold white veins.
• Dragon Scale (A. baginda) — thick silvery leaves with a scale-like texture.
• Black Velvet (A. reginula) — small, almost black and velvety.
• Giant taro (A. macrorrhizos) and the Portora hybrid — “elephant ears” with leaves up to 1 m.

Light, warmth and humidity

Alocasia needs bright indirect light: 1–2 m from a south window or near an east or west one. Direct sun scorches; in shade the stems stretch and new leaves shrink. Keep it at 20–27 °C, not below 18 °C — cold and draughts trigger leaf drop. Aim for humidity of 60% or more; a humidifier works best. Do not mist velvety types.

View full-size photoAlocasia types: Polly, Zebrina, Frydek, Dragon Scale, Black Velvet, and giant taro.

How to water alocasia

Keep the soil lightly moist, never soggy. Water when the top 2–3 cm are dry and always empty the saucer — the rhizome rots easily. Water less in winter when growth slows. Use soft, room-temperature water. Droplets on leaf tips in the morning are guttation, the plant shedding excess water; they contain sap, so keep pets away. Feed every 2 weeks from spring to autumn.

Soil and repotting

The key is an airy, fast-draining mix: an aroid mix of houseplant compost, bark, perlite and a little sphagnum or coir. Choose a pot with large drainage holes, not too big. Repot every 1–2 years in spring when roots fill the pot. See how to repot houseplants.

Winter dormancy: why alocasia drops leaves

Alocasia usually holds only 3–5 leaves: when a new one grows, the oldest yellows and dies — that is normal. In winter, with low light and cooler rooms, some types drop almost all their leaves and go dormant. Do not throw the plant away: the rhizome is alive. Keep it warm and bright, water sparingly so the soil never fully dries, and stop feeding. New shoots will appear in spring.

View full-size photoAlocasia needs airy soil and drainage holes in the pot.

Propagation by corms and division

• Corms — small round corms are often found in the soil when repotting. Set them on damp sphagnum or perlite in a closed container at 22–25 °C; roots and a first leaf appear in a few weeks.
• Division — split a mature clump with several growing points in spring, dusting cuts with charcoal.

Why leaves turn yellow and what to do

• One old leaf yellowing — natural turnover.
• Several leaves yellowing, soft base — overwatering and rot: check the roots.
• Brown crispy edges — dry air.
• Pale speckles and webbing — spider mites, alocasia’s main pest; shower, raise humidity and use a miticide.
• Leaf drop after purchase or a move — stress; it recovers in stable conditions.

More in houseplant problems and symptoms.

Careful: alocasia is toxic

All parts of alocasia contain calcium oxalate crystals. The sap irritates skin and eyes, and if chewed causes intense burning and swelling of the mouth. It is dangerous for cats and dogs. Keep it away from children and pets, wear gloves and wash your hands after repotting. Other bold foliage plants: monstera and more foliage houseplants; browse potted plants.

FAQ

Why is my alocasia “crying”?

Droplets on leaf tips are guttation — the plant releasing excess water after heavy watering or in high humidity. It is not a disease, just a hint not to overwater.

View full-size photoAlocasia propagation by corms in a moist environment.

How many leaves should alocasia have?

Usually 3–5. When a new leaf appears, the oldest often dies back.

Can I save an alocasia with no leaves?

Yes, if the rhizome is firm and not rotten. Keep it warm and water sparingly — it will regrow in spring.

Author: Maria Svitlovir

Graduated from Taras Shevchenko National University of Kyiv, Institute of Biology and Medicine (2001). BSc in Biology, MSc in Horticulture. Writes about plants, works at a garden centre selecting and repotting plants, and contributes to plant reference guides.

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