Small beginnings. Beautiful growth.
Alocasia corms are small dormant buds that grow into a new plant. With warmth, steady humidity and a setup that keeps them out of standing water, many root and sprout within weeks, while others take months. Here is what each stage needs, the equipment that helps and the guides to read along the way.
01Choose
A firm, heavy corm with intact skin is the best start. Variegated corms are always a bit of a gamble: a corm can carry its mother plant’s variegation, but only the first leaves show what you actually have. Buy from a seller who shows the mother plant and ships fast, so the corm does not dry out in transit.
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A place to begin
02Sprout
Peel off loose, dry skin if it comes away easily, then rest the corm on a riser in a clear lidded cup with a little water below it. The riser keeps the base out of the water while the humidity inside the cup wakes the corm up. Keep it warm, ideally 22 to 26 °C, and look for a first root or a green tip.
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Small corm. Big potential.
03Nurture
Once the first leaf unfolds, the plant needs humidity without stagnant air. A humidity cup keeps a dome over the plant and a small reservoir below, so the medium stays evenly moist. Open the lid a little more each week as new leaves harden, and move to a tray when you grow several corms at once.
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Little leaves. A world of possibility.
04Grow
When roots fill the cup, move the plant to a self-watering pot with an airy medium and a cotton wick. Lift out the inner pot to check roots, refill the clear reservoir when it runs low and let the top of the medium breathe.
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More roots. Room to grow.
Usually a few weeks, sometimes several months. Warmth and humidity speed it up, while cold corms can sit still for a long time. A firm corm that is not growing yet is usually still alive.
No. Keep only the base close to water or moist medium, never submerged. A riser holds it above the water so humidity does the work without rot.
White fuzz on the skin is often harmless, but soft or smelly tissue needs action. Cut away soft parts, let the corm dry for a day and restart in a fresh, clean cup. Alocasia Corm Troubleshooting: Mould, Soft Spots and Slow Growth
When it has a few leaves and roots circle the cup. Move it into a self-watering pot and keep humidity up for the first week or two while it adjusts.
