Mature size & growth rate

How big does Waterlily Taro (Colocasia nymphaeifolia) get?

Also called Waterlily Taro, Floating Taro, Aquatic Elephant Ear.

More about waterlily taro

About Waterlily Taro

Colocasia nymphaeifolia · also called Waterlily Taro, Floating Taro · tropical

Colocasia nymphaeifolia is a rare aquatic or semi-aquatic taro species from Southeast Asia, producing floating or semi-emergent leaves resembling those of a waterlily. Unlike common edible taro (Colocasia esculenta), this species is grown ornamentally in water features and paludariums. All Colocasia are toxic to pets and humans when raw.

Mature size: Leaves 20–40 cm across; petioles extending 30–60 cm; spread 60–90 cm at water surface

Watch for — Rhizome rot in cold water: Temperatures below 18°C slow growth and cold, stagnant water can cause rhizome rot. Move containers indoors or to a heated greenhouse before temperatures drop.

Indoor size vs how big it gets in the wild

Waterlily Taro grows into a room-scaled plant of roughly leaves 20–40 cm across — bigger than a tabletop plant, but not a tree. Indoors and in a pot, expect leaves 20–40 cm across. In the ground with no restriction it is a completely different plant — petioles extending 30–60 cm; spread 60–90 cm at water surface — which is why the pot, the light and the pruning matter so much for the size you actually end up with.

It builds steadily in both height and spread to a medium, manageable size, filling a pot and a corner over a few years.

Growth rate and years to mature

Waterlily 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: apply aquatic slow-release fertiliser tablets or sachets into the planting basket at the start of the growing season and again mid-summer. avoid loose granular fertilisers that dissolve freely into pond water and promote algae.

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

How to keep waterlily taro smaller

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

Prune the tallest or longest growth back to a node to hold waterlily taro at the size you want.
Keep it slightly pot-bound and feed sparingly to cap the overall size.
Remove the largest or oldest leaves to keep the footprint in check.

How to grow waterlily taro bigger or faster

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

It already has good light; a yearly pot-up plus spring-summer feeding drives the fastest growth.
Pot up a size every year or two while it is establishing.
Feed and water consistently through the growing season for steady, faster size gain.

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

When waterlily taro outgrows the room (or the pot)

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

It crowds the shelf or corner it lives in and starts leaning for light.
Roots circling the pot base or escaping the drainage holes.
It needs a noticeably bigger pot every year — a sign to pot up, divide, or prune.

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

Waterlily Taro size — frequently asked questions

How big does waterlily taro get?

Waterlily Taro reaches leaves 20–40 cm across when grown indoors, and far larger where it grows unrestricted (petioles extending 30–60 cm; spread 60–90 cm at water surface). It builds steadily in both height and spread to a medium, manageable size, filling a pot and a corner over a few years.

Is waterlily taro slow or fast growing?

Waterlily Taro is a moderate grower. Expect three to six years to reach mature indoor size, gaining a steady amount each growing season. Waterlily Taro grows into a room-scaled plant of roughly leaves 20–40 cm across — bigger than a tabletop plant, but not a tree.

How long does waterlily 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 waterlily taro smaller?

Prune the tallest or longest growth back to a node to hold waterlily taro at the size you want. Keep it slightly pot-bound and feed sparingly to cap the overall size. Remove the largest or oldest leaves to keep the footprint in check.

How can I make waterlily taro grow bigger or faster?

It already has good light; a yearly pot-up plus spring-summer feeding drives the fastest growth. Pot up a size every year or two while it is establishing. Feed and water consistently through the growing season for steady, faster size gain.