Mature size & growth rate

How big does Giant Taro (Alocasia macrorrhizos) get?

Also called Giant Elephant Ear, Upright Elephant Ear.

More about giant taro

About Giant Taro

Alocasia macrorrhizos · also called Giant Elephant Ear, Upright Elephant Ear · tropical

Giant Taro is a massive upright Alocasia with glossy, arrow-shaped leaves held skyward on stout stems, reaching several metres in the tropics. It makes a bold architectural statement indoors and out. A fast, hungry, thirsty aroid, it loves warmth, rich soil and high humidity, and demands far more water than most houseplant Alocasias.

Mature size: Outdoors in the tropics 3-5 m tall with leaves up to 1 m long; indoors commonly 1.5-2.5 m with leaves 60-90 cm.

Indoor size vs how big it gets in the wild

Giant Taro is a tree at heart. Indoors a pot and your ceiling keep it to commonly 1.5-2.5 m with leaves 60-90 cm., but in the ground it is a different scale of plant entirely (outdoors in the tropics 3-5 m tall with leaves up to 1 m long). Indoors and in a pot, expect commonly 1.5-2.5 m with leaves 60-90 cm.. In the ground with no restriction it is a completely different plant — outdoors in the tropics 3-5 m tall with leaves up to 1 m long — which is why the pot, the light and the pruning matter so much for the size you actually end up with.

It gains real height on a trunk or main stem, adding a tier of leaves a year and eventually reaching for the ceiling — this is a plant you grow up, not out.

Growth rate and years to mature

Giant Taro is a moderate grower. Realistically, expect three to six years to reach mature indoor size, gaining a steady amount each growing season. Its feeding profile backs this up: a heavy feeder: feed every two to four weeks through spring and summer with a balanced liquid fertiliser at full or half strength to fuel its fast, large growth. reduce or stop feeding in autumn and winter. adequate feeding is key to producing its full-sized leaves.

Want this turned into the right next pot at the right moment? The pot size calculator and the giant taro repotting guide cover when and how much to size up — pot size is one of the biggest levers on how fast giant taro grows.

How to keep giant taro smaller

You are not stuck with the maximum size. For giant taro specifically, these are the levers, in order of impact:

The decisive tool is the secateurs: giant taro can be topped (cut the main growing tip) to cap its height and force a bushier, shorter shape.
Keeping it deliberately pot-bound in a snug container slows the whole plant and limits ultimate size.
Prune in spring so it heals fast; remove the tallest leader back to a node to reset the height.
Expect to top or hard-prune it every year or two — left alone it heads for the ceiling.

The keep-it-smaller method, step by step

Pick the new height. Decide how tall you want giant taro and find a leaf node or branch point just below that.
Top the main stem. Cut the main growing tip cleanly just above that node in spring; this permanently caps the height and forces side branches.
Keep the pot snug. Avoid jumping to a much bigger pot — a slightly restricted rootball keeps the whole plant smaller.
Maintain the shape. Prune back the tallest new leaders each spring to hold it at the height you chose.

How to grow giant taro bigger or faster

If you want it to fill the space sooner, push the conditions rather than hoping — for giant taro the accelerators are:

It already wants the bright light it needs; warmth, a yearly pot-up and spring-summer feed are the accelerators.
Pot up a size every year or two while young; restricted roots are the main thing holding height back.
Feed regularly through the growing season and keep it warm — height comes from sustained good conditions.

Light is almost always the ceiling. The giant taro light requirements page covers exactly how bright a spot it needs to grow at its potential instead of stalling.

When giant taro outgrows the room (or the pot)

"Too big" usually arrives as one of these signs for giant taro:

The top leaves pressing against or bent by the ceiling — the classic "this is now too tall indoors" sign.
It has to be moved away from a light source it has literally outgrown.
Roots filling the largest pot you can reasonably keep indoors — at that point it is top-or-prune or move it outside (if hardy).

If it is the pot rather than the room, it is a repotting job, not a goodbye — see the giant taro repotting guide. If you want more of this plant instead of a bigger one, the giant taro propagation guide turns prunings into new plants.

Giant Taro size — frequently asked questions

How big does giant taro get?

Giant Taro reaches commonly 1.5-2.5 m with leaves 60-90 cm. when grown indoors, and far larger where it grows unrestricted (outdoors in the tropics 3-5 m tall with leaves up to 1 m long). It gains real height on a trunk or main stem, adding a tier of leaves a year and eventually reaching for the ceiling — this is a plant you grow up, not out.

Is giant taro slow or fast growing?

Giant Taro is a moderate grower. Expect three to six years to reach mature indoor size, gaining a steady amount each growing season. Giant Taro is a tree at heart. Indoors a pot and your ceiling keep it to commonly 1.5-2.5 m with leaves 60-90 cm., but in the ground it is a different scale of plant entirely (outdoors in the tropics 3-5 m tall with leaves up to 1 m long).

How long does giant taro take to reach full size?

Roughly three to six years to reach mature indoor size, gaining a steady amount each growing season. Light, pot size and feeding move that timeline more than anything else.

How do I keep giant taro smaller?

The decisive tool is the secateurs: giant taro can be topped (cut the main growing tip) to cap its height and force a bushier, shorter shape. Keeping it deliberately pot-bound in a snug container slows the whole plant and limits ultimate size. Prune in spring so it heals fast; remove the tallest leader back to a node to reset the height. Expect to top or hard-prune it every year or two — left alone it heads for the ceiling.

How can I make giant taro grow bigger or faster?

It already wants the bright light it needs; warmth, a yearly pot-up and spring-summer feed are the accelerators. Pot up a size every year or two while young; restricted roots are the main thing holding height back. Feed regularly through the growing season and keep it warm — height comes from sustained good conditions.