Alocasias — commonly called Elephant Ears — are defined by their tall stems and dramatic arrow-shaped leaves. There are over 80 known species, from compact tabletop varieties to 3m giants, native to the rainforests of the Philippines, Borneo, and through Southeast Asia.

They're a striking plant, and increasingly popular, but they have a reputation that's worth being honest about upfront: Alocasias are not beginner aroids. They drop leaves dramatically when stressed, slip into semi-dormancy through cooler months, and resent overwatering more than most plants in the family. None of this is failure — it's how the plant works — but it catches a lot of people out if they don't know to expect it.

The good news: once you understand the corm system underneath the mix, most of the alarming behaviour stops being alarming.

A note on corms

Underneath the mix, Alocasias grow from corms — bulb-like storage structures that hold energy reserves. The visible plant (stems, leaves) is essentially the above-ground expression of what's happening to the corm. When conditions are good, the corm pushes leaves. When conditions get tough (low light, cold, drought, root disturbance), the plant often drops leaves and the corm holds on underground until conditions improve.

This is why an Alocasia that looks completely dead in winter often re-emerges from "nothing" in spring. The corm was fine. The plant was just waiting.

It's also why overwatering is so dangerous — once the corm rots, there's no recovery. Above-ground leaves can be regrown; a rotten corm is game over.

Light

Bright, indirect light is the sweet spot — and Alocasias are unusual among aroids in that they genuinely want a lot of it. In low light they sulk, drop leaves, and slip into dormancy even outside of winter.

Keep them out of harsh direct afternoon sun. The leaves are thin and burn quickly. Gentle morning sun is fine for most species — but If you're growing darker-leaved varieties like Alocasia wentii, even direct morning sun can scorch. Darker-leaved varieties tend to scorch more easily in direct sun than their lighter-leaved relatives. Tolerance isn't preference, and with Alocasias, preference matters more than with most aroids.

If your space isn't bright, consider a grow light — the Ori Grow Light is a clean option. Grow lights also help keep Alocasias active through winter when they'd otherwise die back.

Shadow Test: Hold your hand about 10cm above a leaf at midday. Crisp, defined shadow = good light, the plant will push regular growth. Soft, fuzzy shadow = your Alocasia is likely to slow down or go dormant.

Water

This is the section to read twice. Alocasias rot faster than most aroids when overwatered, and the damage is largely irreversible once it reaches the corm.

The rule: let the top third of the mix dry out before the next water during the growing season. Then water thoroughly — slow, even, until water runs from the drainage holes — and let the excess drain completely. Don't let the pot sit in a saucer of water. In dormancy (often winter), back off significantly: water just enough to stop the corm shrivelling, much less than you'd give an active plant.

This is genuinely a case where less is more. An Alocasia that's slightly under-watered will sulk briefly and recover. An Alocasia that's been sitting in wet mix for weeks may not recover at all.

Pot Weight Test: Lift the pot just after watering, then again every few days. Once you know what "freshly watered" and "ready for another drink" feel like, you stop guessing. Alocasias particularly benefit from this — the visible leaves give you no early warning, so weight is your best diagnostic.

Some experienced growers run Alocasias slightly moister than I'm describing here. If that's working for you, keep doing it. The framing in this guide is conservative because for most home growers, dry-down is safer than slightly-moist — the margin for error is bigger.

Mix

Alocasias want a chunky, free-draining mix more than almost any other aroid. The corm sits in the mix and is the first thing to suffer if the structure compacts or holds water for too long. Standard potting mix on its own is rarely chunky enough.

A specialised Aroid Mix — bark, perlite, coco coir, and charcoal — is exactly what they want. The bark and perlite create air pockets around the corm, the coir holds moisture without going sodden, and charcoal helps prevent the mix going sour.

Finger Probe Test: Push your index finger as deep into the mix as it'll go. What you find tells you something useful:

• Cool, dark, slightly damp: the mix is doing its job — holding moisture without going sodden.
• Wet, heavy, compacted: the mix is too dense or hasn't dried out enough between waterings. The corm is at risk.
• Dry, crumbly, falls off your finger: the mix has gone hydrophobic — usually from being left dry too long, or from an older mix breaking down. Water runs through without being absorbed.
• Hitting a wall of roots or a firm corm: the plant has filled its pot. Time to repot, one size up with fresh mix.
• Sour or musty smell on your finger: the mix has gone anaerobic — lost oxygen, usually from prolonged saturation. With Alocasias, this is alarm bells.. Repot immediately into fresh, chunky mix, inspect the corm, cut away any soft or blackened sections.

You're not chasing a verdict on every reading. You're building a picture of how your mix behaves over time.

A specific Alocasia note on repotting: they resent oversizing. One size up at most. The corm wants to feel snug; a big pot full of damp mix is exactly the conditions for rot.

Feed

While the plant is actively pushing new growth — new leaves unfurling, fresh stems emerging — feed fortnightly with a liquid fertiliser. When growth pauses or the plant slips into dormancy, stop completely. Feeding a non-growing Alocasia builds up salts in the mix, and salt build-up is another way to damage the corm.

Aroid Plant Food is the strongest fit — formulated specifically for aroids like Alocasias, urea-free, nitrate-based nitrogen, with chelated micronutrients that support clean new growth without pushing the soft, leggy growth that high-nitrogen fertilisers encourage. Use at the rate on the bottle, every two weeks, while the plant is growing.

A common mistake worth flagging: high-nitrogen "more growth" thinking. Older care advice often recommends pushing nitrogen with Alocasias because they're fast growers, but in indoor conditions with imperfect light, high-N fertilisers produce weak, stretched growth that's more vulnerable to pests and structural failure. A balanced aroid-specific formula gives you better leaves and a stronger plant.

Dormancy

Worth its own section because so many Alocasia "deaths" are actually dormancy.

Through cooler months — particularly in Melbourne and other temperate Australian cities — Alocasias often shed most or all of their leaves and appear to die. The corm is fine. It's storing energy and waiting for warmer temperatures, brighter light, and longer days to push new growth.

If your Alocasia goes dormant:

• Prune off any fully dead leaves — keep partially-green ones, they're still feeding the corm
• Cut watering back drastically — just enough to stop the corm shrivelling
• Stop feeding entirely until growth resumes
• Keep the pot somewhere bright so the plant has a chance to push when it's ready
• Wait. Spring almost always brings the plant back.

You can also avoid dormancy altogether by keeping light and temperature up through winter — grow lights and a warmer room (above 18°C) will often keep an Alocasia active year-round. But dormancy isn't a failure mode. It's a survival strategy.

Propagation

Alocasias propagate from corm division. When repotting, gently tease the rhizome apart and separate any baby corms that have formed alongside the main one. Pot each into its own small pot with fresh chunky mix. Keep the mix barely moist while the new corm establishes — overwatering at this stage is the most common reason propagation fails.

Troubleshooting

Yellow lower leaves: Usually overwatering. Run the Pot Weight Test and Finger Probe Test, ease off watering, check for any softness at the base of the stem. Catching it early can save the plant.

Yellow upper leaves or pale new growth: Light or feed. If you're feeding fortnightly and watering on a sensible rhythm, the plant probably needs more light.

Crispy brown leaf edges: Usually low humidity combined with inconsistent watering. Alocasias prefer humidity above 50% — pebble trays, humidifiers, or grouping with other plants help. Air conditioning and indoor heating both dry the air aggressively.

Sudden leaf drop with no warning: Usually a stress response — could be cold draught, dramatic light change, recent repot, or root disturbance. Don't panic, don't repot again, don't double up on water. Hold steady on conditions and the plant usually recovers within weeks.

Pests: Spider mites are the main culprit, particularly in dry indoor air. Look for fine webbing on the undersides of leaves, or tiny mites visible against a white background. Wipe leaves regularly with a damp cloth or Neem Oil Leaf Shine for clean foliage that helps you spot problems early. Quarantine and treat any infested plant immediately — spider mites spread fast across a collection.

Old leaf yellowing while a new one emerges: Often nothing to worry about. Many Alocasias — particularly smaller plants — naturally cycle leaves, sacrificing an older one to fuel a new one. As long as the new growth looks healthy and the corm feels firm at the base, this is normal plant behaviour, not a problem to fix.

Good to Know

Alocasias are toxic to pets and children. They contain particularly high concentrations of calcium oxalate crystals, and chewing causes severe oral pain, swelling, drooling, and in some cases difficulty swallowing. Worth taking seriously if you have curious cats, dogs, or toddlers. The indoor plants safe for cats and indoor plants safe for dogs guides cover what to keep them away from and safer alternatives.

Alocasia belongs to the Araceae family — the same family as Monstera, Philodendron, Anthurium and Peace Lily. That said, Alocasias are more demanding than most of their family relatives. The chunky mix, steady feeding, and bright light preferences are shared. The vulnerability to overwatering and the dormancy behaviour are more pronounced.