Mature size & growth rate

How big does Amorphophallus maximus (Amorphophallus maximus) get?

Also called maximum voodoo lily, giant amorphophallus.

More about amorphophallus maximus

About Amorphophallus maximus

Amorphophallus maximus · also called maximum voodoo lily, giant amorphophallus · tropical

Amorphophallus maximus is a large tropical African tuberous aroid grown from a big corm. Each season it sends up a single, broadly divided umbrella leaf on a tall mottled petiole, dying back to a dormant corm afterwards. It needs warmth, humidity, bright filtered light and very free-draining soil, and rewards patient growers with an architectural seasonal leaf and occasional malodorous bloom.

Mature size: Leaf commonly 1-2 m tall with a wide spread on a mature corm, forming an impressively architectural seasonal specimen.

Watch for — Leaflet browning: Very dry air browns the leaflets. Raise humidity in growth and keep the plant away from heat sources.

Indoor size vs how big it gets in the wild

Amorphophallus maximus is a floor plant that becomes a room feature — it builds to roughly leaf commonly 1-2 m tall with a wide spread on a mature corm, forming an impressively architectural seasonal specimen. indoors and reads as a single bold specimen. Indoors and in a pot, expect leaf commonly 1-2 m tall with a wide spread on a mature corm, forming an impressively architectural seasonal specimen.. A pot, your light levels and a little pruning are what set the final size in a home, far more than the plant's theoretical potential.

It gains both height and spread as a substantial floor plant, filling a corner over a few years rather than staying on a shelf.

Growth rate and years to mature

Amorphophallus maximus 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: feed every 2-3 weeks during active leaf growth with a balanced liquid fertiliser at half strength to bulk up the corm. stop feeding once the leaf starts to die back into dormancy.

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

How to keep amorphophallus maximus smaller

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

Prune the tallest stems or canes back to a node — amorphophallus maximus responds by branching lower and staying more compact.
Hold it in a snug pot and ease off feed to slow the overall build.
Remove the largest outer leaves to reduce the visual footprint without harming the plant.
Plan on a yearly tidy — at this rate it fills its space quickly.

How to grow amorphophallus maximus bigger or faster

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

It already has the light it needs; a yearly pot-up plus spring-summer feeding drives the fastest fill.
Pot up while young so roots are never the bottleneck on size.
Feed and water consistently through the growing season for the biggest leaves and fastest fill.

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

When amorphophallus maximus outgrows the room (or the pot)

"Too big" usually arrives as one of these signs for amorphophallus maximus:

It crowds a walkway or blocks a window it used to sit beside.
Leaves browning where they press on a wall or ceiling.
Roots packing the largest pot you want indoors — time to prune hard, divide, or rehome it.

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

Amorphophallus maximus size — frequently asked questions

How big does amorphophallus maximus get?

Amorphophallus maximus reaches leaf commonly 1-2 m tall with a wide spread on a mature corm, forming an impressively architectural seasonal specimen. when grown indoors. It gains both height and spread as a substantial floor plant, filling a corner over a few years rather than staying on a shelf.

Is amorphophallus maximus slow or fast growing?

Amorphophallus maximus is a moderate grower. Expect three to six years to reach mature indoor size, gaining a steady amount each growing season. Amorphophallus maximus is a floor plant that becomes a room feature — it builds to roughly leaf commonly 1-2 m tall with a wide spread on a mature corm, forming an impressively architectural seasonal specimen. indoors and reads as a single bold specimen.

How long does amorphophallus maximus 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 amorphophallus maximus smaller?

Prune the tallest stems or canes back to a node — amorphophallus maximus responds by branching lower and staying more compact. Hold it in a snug pot and ease off feed to slow the overall build. Remove the largest outer leaves to reduce the visual footprint without harming the plant. Plan on a yearly tidy — at this rate it fills its space quickly.

How can I make amorphophallus maximus grow bigger or faster?

It already has the light it needs; a yearly pot-up plus spring-summer feeding drives the fastest fill. Pot up while young so roots are never the bottleneck on size. Feed and water consistently through the growing season for the biggest leaves and fastest fill.