How to grow and care for Alocasia longiloba Indoors

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Alocasia longiloba Care

Botanical name: Alocasia longiloba
Family: Araceae

Alocasia longiloba Description

Alocasia longiloba bears large, arrow-shaped, bluish-green leaves with silver margins and veining and light-green or purple undersides which are held on mottled brown leaf stalks.

The plant is moderately easy to grow indoors and is a spectacular addition to any houseplant collection on account of its magnificent foliage.

Alocasia longiloba is a sought after Alocasia plant that will add an exotic feel to any home or space.

Alocasia longiloba was documented in the 1800s by Fredrich Anton Wilheim Miquel in Philippines. The Latin word, 'longilobus' was used in reference to the elongated lobes of the mature leaves.

Alocasia longiloba Size

Alocasia longiloba is a slow-growing, herbaceous plant which grows to a height of 5 ft and 3 ft wide in about 5-6 years. The arrow-shaped leaves can grow to about 1-2 ft long.

Alocasia longiloba Flower

The flowers in Alocasia longiloba are held on a spandix which is enclosed in a green to white colored spathe and only last a few days. To conserve the plants energy and direct it to foliage growth, cut the flowers as soon as they appear, though, it is unlikely to flower when grown indoors.

Alocasia longiloba Origin

Alocasia longiloba is native to tropical forests of China and East Asia. It has a widespread distribution in Guangdong, Hainan, and southern Yunnan in China, mainland Southeast Asia, and western and central Malesia.

Alocasia longiloba Varieties

Alocasia longiloba is a species complex of closely related Alocasia plants that are very similar that it is dificult to diferentiate between them.

Some Alocasia plants that were intially placed in the Alocasia longiloba species complex but are now considered as varieties or types include; 'argyrea', 'korthalsii', 'lowii', and 'watsoniana'.

Alocasia longiloba for Sale

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Alocasia longiloba Care

Photo Credit: Wikipedia

Alocasia longiloba Care Indoors

Alocasia longiloba Light Requirements

Alocasia longiloba grows best in bright, indirect light. It also does well under flourscent light. Keep your Alocasia longiloba away from direct sunlight as it can cause the leaves to be sunscorched (brown marks on the leaves).

Too little light for your Alocasia longiloba will signal dormancy to your plant which may cause the leaves to start dying in readiness for dormancy.

Regularly turn the pot to ensure that your Alocasia longiloba gets light on all sides for even growth to prevent lop-sided growth. Check out this guide on understanding light for houseplants.

How to water Alocasia longiloba

Water Alocasia longiloba thoroughly and allow the top 2 in. of soil to dry out between waterings. Reduce watering during the cold season to keep the soil barely moist but never allow the soil to dry out completely.

Underwatering your Alocasia longiloba will signal dormancy to your plant which may cause the leaves to start dying in readiness for dormancy.

Alocasia longiloba does not like soggy soil as it is prone to fungal infestations like root-rot.

Therefore, ensure the pot for your Alocasia longiloba has a drainage hole to prevent the soil from getting soggy. Read more on how to water houseplants.


Temperature for Alocasia longiloba

Average warmth from 180C to 250C is ideal for your Alocasia longiloba. Below 150C, Alocasia longiloba may drop all its leaves and go into dormancy stage.

Alocasia longiloba also needs to be protected from draughts as it hates sudden changes in temperature. Check out this guide on understanding temperature for houseplants.

Humidity for Alocasia longiloba

Alocasia longiloba requires high humidity inorder to thrive. To raise humidity for your Alocasia longiloba set the pot on a wet pebble tray or place it in a bathroom or other moist areas in the home. Check out these techniques on how to raise the humidity for houseplants.

How to Clean Alocasia longiloba

Regularly clean the leaves of your Alocasia longiloba by damp wiping them with a soft cloth to get rid of dust and discourage pests infestation. Read more on how to clean houseplants.

Alocasia longiloba Fertilizer (Feeding)

Feed Alocasia longiloba with a balanced water-soluble fertilizer every 4 weeks during the growing period. Withhold feeding during the cold season as the plant undergoes dormancy during this period and growth is minimal at this time.

Regularly flush out accumulated salts arising from fertilizers every 2-3 months for your Alocasia longiloba by running a stream of water through the soil until the water comes out through the drainage holes.

Let the stream of water run for a few minutes. Repeat the process several times. Read more on how to feed houseplants.

Alocasia longiloba Repotting

Alocasia longiloba prefers to be root-bound, therefore frequent repotting is not needed. Avoid frequent repotting as the plant can take long to recover from repotting shock. Repotting every 2-3 years should be adequate.

Repot into a 1 size larger pot during the growing season only if the roots of your Alocasia longiloba have grown out through the drainage holes.

The best soil for your Alocasia longiloba is a rich, free-draining soil inorder to ensure that it does not retain excessive moisture which can lead to rotting.

Ensure that the pot has a drainage hole to prevent the soil from getting soggy as it can lead to fungal infestations.

Alocasia longiloba Pruning

Pruning Alocasia longiloba is easy as it only requires removal of yellow and diseased leaves as they occur to maintain your plant neat and to reduce chances of diseases and pests infestation.

Remove the leaves by cutting at the base with a sterilized knife or pair of scissors to avoid disease transimission. Take care not to injure the new leaves that are forming.

Alocasia longiloba Propagation

Alocasia longiloba can be propagated by plant division at the beginning of the growing season.

Buy beautiful and healthy Alocasia longiloba from Etsy.

How to Propagate Alocasia longiloba by Plant Division

Carefully take out your Alocasia longiloba from its pot and gently divide the rhizome into sections by cutting through with a sharp sterilized knife. Ensure that each section has 1-2 stems.

Plant the Alocasia longiloba divisions in individual pots in moist free-draining soil at the same depth that they were in the previous pot.

Ensure that the pot has a drainage hole to prevent the soil from getting soggy as it can lead to rotting.

Place the set up in a warm, well-lit place and maintain the soil moist until new growth emerges after which routine care can begin.

Alocasia longiloba Care

Photo Credit:305 Greenery, Inc.

Alocasia longiloba Problems Indoors

Why are the leaves of my Alocasia longiloba losing color and dying?

The reason why the leaves of your Alocasia longiloba are losing color and dying is too little light.

Alocasia longiloba grows best in bright, indirect light but away from direct sunlight.

Move the plant to a brighter spot and ensure it receives bright, indirect light and protect it from direct sunlight. Check out this guide on understanding light for houseplants.

Why are the leaves of my Alocasia longiloba dropping and the plant dying?

There are three possible reasons why the leaves of your Alocasia longiloba are dropping and the plant is dying. These three reasons signal dormancy for Alocasia longiloba and hence the leaves die in readiness to enter dormancy.

This happens during the cold season (winter) when the plant undergoes dormancy. Even if the foliage may die, the underground rhizome is still alive and can regrow under favorable conditions.

One possible reason why the leaves of your Alocasia longiloba are dropping and the plant is dying is too little light.

Alocasia longiloba grows best in bright, indirect light but away from direct sunlight.

Move the plant to a brighter spot and ensure it receives bright, indirect light. Check out this guide on understanding light for houseplants.

The second possible reason why the leaves of your Alocasia longiloba are dropping and the plant is dying is too low temperature below 150C.

Alocasia longiloba grows best in average warmth between 180C and 250C. Protect the plant from cold and hot draughts which cause sudden changes in temperature.

The third possible reason why the leaves of your Alocasia longiloba are dropping and the plant is dying is underwatering.

Alocasia longiloba prefers the soil to be kept moderately moist during the growing season and watering to be reduced in the cold season to keep the soil barely moist but never allow the soil to dry out completely.

Why do the leaves of my Alocasia longiloba have brown leaf edges?

One possible cause of brown leaf edges in your Alocasia longiloba is low humidity. Where the air temperatures are high, the air humidity is likely to reduce significantly.

Set the pot on a wet pebble tray to raise humidity for your Alocasia longiloba or place the plant in a bathroom or other moist areas in the home. Check out these techniques on how to raise humidity for houseplants.

The second possible cause of brown leaf edges in your Alocasia longiloba is accumulation of salts in the soil which could have come from fertilizers or water.

Regularly flush out accumulated salts arising from fertilizers every 2-3 months for your Alocasia longiloba by running a stream of water through the soil until the water comes out through the drainage holes.

Let the stream of water run for a few minutes. Repeat the process several times. Read more on how to feed houseplants.

Why are the leaves of my Alocasia longiloba drooping?

There are two possible causes of drooping leaves in your Alocasia longiloba.

One possible cause of drooping leaves in your Alocasia longiloba is too little light. Move your plant to a brighter spot. Alocasia longiloba prefers medium to bright, indirect light but away from direct sunlight.

The second possible cause of drooping leaves in your Alocasia longiloba is underwatering. Alocasia longiloba prefers the soil to be kept slightly moist during the growing season.

Reduce watering in the cold season to keep the soil barely moist but never allow the soil to dry out completely. Read more on how to water houseplants.

Why are the leaves of my Alocasia longiloba yellowing and dropping?

Low humidity is the reason for the yellowing and dropping of the leaves of your Alocasia longiloba.

Set the pot on a wet pebble tray to raise humidity for your plant. Check out these techniques on how to raise humidity for houseplants.

However, it is natural for the old leaves of Alocasia longiloba to turn yellow and drop as the plant continues to grow.

Remove such leaves by snipping them off at the base with a clean sharp knife or a pair of scissors to keep the plant neat and reduce pests and disease infestations.

Why are there dark brown or black spots on leaves of my Alocasia longiloba?

Dark brown or black spots on leaves of your Alocasia longiloba are an indication of Leaf Spot Disease which is enhanced by soggy soil and overwet conditions.

Isolate the affected plant immediately to prevent spread to other houseplants, remove the damaged leaves and treat with a fungicidal solution.

Ensure that there is proper drainage of both the soil and the pot to prevent the soil from getting soggy.

Avoid misting and wetting the leaves to keep them dry and ensure there is good air circulation for your Alocasia longiloba.

Alocasia longiloba Pests

Common plant pests in Alocasia longiloba are Spider Mites, Mealy Bugs, Scales and Aphids.

Isolate the affected Alocasia longiloba to prevent further spread to other houseplants and treat it appropriately for the pests.

Is Alocasia longiloba toxic?

Alocasia longiloba like other Alocasia Plants is toxic to both humans and pets.

Alocasia longiloba contains crystals of calcium oxalate which if ingested can numb and swell the tongue and pharynx leading to difficulty in breathing and sharp pain in the throat.

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