Mature size & growth rate

How big does Typhonium venosum (Typhonium venosum) get?

Also called Voodoo Lily, Devil's Tongue.

More about typhonium venosum

About Typhonium venosum

Typhonium venosum · also called Voodoo Lily, Devil's Tongue · tropical

Typhonium venosum (formerly Sauromatum venosum) is a tuberous aroid famous for a dramatic purple-spotted spathe that emits a strong carrion smell to attract fly pollinators. After flowering, a single umbrella-like, divided leaf unfurls on a mottled stalk. The dormant tuber will even bloom dry on a windowsill, making it a curiosity-grower favourite.

Mature size: The leaf reaches about 30-50 cm tall; the inflorescence can be 20-30 cm long. Tubers enlarge and offset with age.

Indoor size vs how big it gets in the wild

Typhonium venosum stays fairly low but widens over time — it spreads into a bigger clump by offsets, runners or rhizomes rather than shooting upward. Indoors and in a pot, expect the leaf reaches about 30-50 cm tall. In the ground with no restriction it is a completely different plant — the inflorescence can be 20-30 cm long. tubers enlarge and offset with age. — which is why the pot, the light and the pruning matter so much for the size you actually end up with.

Size here is about width, not height: the plant builds an ever-wider clump or sends out plantlets and runners while staying relatively short.

Growth rate and years to mature

Typhonium venosum 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 2-4 weeks with a balanced liquid fertiliser only while the leaf is actively growing; do not feed the dormant tuber.

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

How to keep typhonium venosum smaller

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

Divide the clump every year or two — splitting typhonium venosum is the main way to control its spread and refresh it.
Remove runners, plantlets or offsets as they appear if you want it to stay a single tight clump.
Keep it slightly pot-bound; a snug pot naturally limits how wide the clump can get.

The keep-it-smaller method, step by step

Lift the whole plant. Slide typhonium venosum out of its pot in spring when the clump has filled it.
Split the clump. Tease or cut the rootball into two or more sections, each with healthy roots and growth.
Repot one division. Put a single division back in the original pot to reset it to a smaller size; pot or give away the rest.
Remove offsets as they form. Through the year, detach new runners or pups to stop it spreading again.

How to grow typhonium venosum bigger or faster

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

Give it a wider pot and let the clump fill it — width is exactly how this plant gets bigger.
Good light plus regular feeding maximises offset and runner production.
Leave plantlets and offsets attached and feed through the growing season for the fastest spread.

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

When typhonium venosum outgrows the room (or the pot)

"Too big" usually arrives as one of these signs for typhonium venosum:

The clump bulging over the pot rim or splitting the pot — the cue to divide, not to find a bigger room.
A dense centre that goes bare or tired while the edges keep spreading.
Runners or offsets escaping across the shelf or into neighbouring pots.

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

Typhonium venosum size — frequently asked questions

How big does typhonium venosum get?

Typhonium venosum reaches the leaf reaches about 30-50 cm tall when grown indoors, and far larger where it grows unrestricted (the inflorescence can be 20-30 cm long. tubers enlarge and offset with age.). Size here is about width, not height: the plant builds an ever-wider clump or sends out plantlets and runners while staying relatively short.

Is typhonium venosum slow or fast growing?

Typhonium venosum is a moderate grower. Expect three to six years to reach mature indoor size, gaining a steady amount each growing season. Typhonium venosum stays fairly low but widens over time — it spreads into a bigger clump by offsets, runners or rhizomes rather than shooting upward.

How long does typhonium venosum 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 typhonium venosum smaller?

Divide the clump every year or two — splitting typhonium venosum is the main way to control its spread and refresh it. Remove runners, plantlets or offsets as they appear if you want it to stay a single tight clump. Keep it slightly pot-bound; a snug pot naturally limits how wide the clump can get.

How can I make typhonium venosum grow bigger or faster?

Give it a wider pot and let the clump fill it — width is exactly how this plant gets bigger. Good light plus regular feeding maximises offset and runner production. Leave plantlets and offsets attached and feed through the growing season for the fastest spread.