Mature size & growth rate

How big does Stapelia leendertziae (Stapelia leendertziae) get?

Also called black bell stapelia.

More about stapelia leendertziae

About Stapelia leendertziae

Stapelia leendertziae · also called black bell stapelia · houseplant

Stapelia leendertziae, the black bell stapelia, is a striking South African stem succulent unusual among its kin for deep maroon-black, bell-shaped flowers rather than flat stars. Its soft four-angled grey-green stems clump from the base. Like other carrion flowers it lures flies with a faint foul scent, and it grows best with bright light, gritty soil, and a dry winter rest.

Mature size: Stems grow about 15-20 cm (6-8 in) tall, spreading to around 30 cm (12 in); the bell-shaped flowers can be 7-12 cm long.

Indoor size vs how big it gets in the wild

Stapelia leendertziae 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 stems grow about 15-20 cm (6-8 in) tall, spreading to around 30 cm (12 in). In the ground with no restriction it is a completely different plant — the bell-shaped flowers can be 7-12 cm long. — 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

Stapelia leendertziae 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 once a month in spring and summer with a half-strength, low-nitrogen cactus feed. heavy or high-nitrogen feeding yields soft, rot-prone stems and fewer blooms. stop feeding entirely during the autumn and winter dormancy.

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

How to keep stapelia leendertziae smaller

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

Divide the clump every year or two — splitting stapelia leendertziae 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 stapelia leendertziae 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 stapelia leendertziae bigger or faster

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

When stapelia leendertziae outgrows the room (or the pot)

"Too big" usually arrives as one of these signs for stapelia leendertziae:

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

Stapelia leendertziae size — frequently asked questions

How big does stapelia leendertziae get?

Stapelia leendertziae reaches stems grow about 15-20 cm (6-8 in) tall, spreading to around 30 cm (12 in) when grown indoors, and far larger where it grows unrestricted (the bell-shaped flowers can be 7-12 cm long.). 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 stapelia leendertziae slow or fast growing?

Stapelia leendertziae is a moderate grower. Expect three to six years to reach mature indoor size, gaining a steady amount each growing season. Stapelia leendertziae 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 stapelia leendertziae 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 stapelia leendertziae smaller?

Divide the clump every year or two — splitting stapelia leendertziae 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 stapelia leendertziae 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.