Mature size & growth rate

How big does Colocasia Antiquorum (Colocasia antiquorum) get?

Also called dasheen, old-world taro.

More about colocasia antiquorum

About Colocasia Antiquorum

Colocasia antiquorum · also called dasheen, old-world taro · edible

Colocasia antiquorum, the old-world dasheen taro, is a heat-loving aroid grown for its starchy corms and downward-pointing peltate leaves. It thrives in warm, swampy, fertile ground with constant moisture and high humidity, growing fast in a single season. All raw parts contain calcium oxalate and must be thoroughly cooked before eating.

Mature size: 0.9-1.5 m tall with a similar spread in one season; leaves up to 60 cm long.

Watch for — Stunted or small corms: Too little sun, a short cool season, or insufficient feeding produces tiny corms; give full sun, a long warm season and rich soil.

Indoor size vs how big it gets in the wild

Colocasia Antiquorum is a tree at heart. Indoors a pot and your ceiling keep it to 0.9-1.5 m tall with a similar spread in one season, but in the ground it is a different scale of plant entirely (leaves up to 60 cm long.). Indoors and in a pot, expect 0.9-1.5 m tall with a similar spread in one season. In the ground with no restriction it is a completely different plant — leaves up to 60 cm 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

Colocasia Antiquorum is a fast grower. Realistically, expect two to four years from a young plant to a room-filling specimen in good light. Its feeding profile backs this up: heavy feeder. apply a balanced or slightly nitrogen-rich fertiliser every 3-4 weeks through the growing season, easing off as corms mature in late summer to favour starch storage over leaf growth.

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

How to keep colocasia antiquorum smaller

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

The decisive tool is the secateurs: colocasia antiquorum 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 colocasia antiquorum 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 colocasia antiquorum bigger or faster

If you want it to fill the space sooner, push the conditions rather than hoping — for colocasia antiquorum 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 colocasia antiquorum light requirements page covers exactly how bright a spot it needs to grow at its potential instead of stalling.

When colocasia antiquorum outgrows the room (or the pot)

"Too big" usually arrives as one of these signs for colocasia antiquorum:

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 colocasia antiquorum repotting guide. If you want more of this plant instead of a bigger one, the colocasia antiquorum propagation guide turns prunings into new plants.

Colocasia Antiquorum size — frequently asked questions

How big does colocasia antiquorum get?

Colocasia Antiquorum reaches 0.9-1.5 m tall with a similar spread in one season when grown indoors, and far larger where it grows unrestricted (leaves up to 60 cm 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 colocasia antiquorum slow or fast growing?

Colocasia Antiquorum is a fast grower. Expect two to four years from a young plant to a room-filling specimen in good light. Colocasia Antiquorum is a tree at heart. Indoors a pot and your ceiling keep it to 0.9-1.5 m tall with a similar spread in one season, but in the ground it is a different scale of plant entirely (leaves up to 60 cm long.).

How long does colocasia antiquorum take to reach full size?

Roughly two to four years from a young plant to a room-filling specimen in good light. Light, pot size and feeding move that timeline more than anything else.

How do I keep colocasia antiquorum smaller?

The decisive tool is the secateurs: colocasia antiquorum 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 colocasia antiquorum 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.