Mature size & growth rate

How big does Cat's Jaws (Faucaria felina) get?

Also called Tiger Jaws Faucaria, Cat Jaws Succulent, Faucaria.

More about cat's jaws

About Cat's Jaws

Faucaria felina · also called Tiger Jaws Faucaria, Cat Jaws Succulent · houseplant

Faucaria felina is a stemless South African succulent with pairs of triangular, tooth-edged leaves that resemble an open mouth or jaw. It produces bright yellow daisy-like flowers in autumn. Easy to grow in a sunny spot, it is highly drought-tolerant. Not individually listed by the ASPCA; treat with caution and keep away from pets as a precaution.

Mature size: 5–10 cm tall; clumps spread to 20–30 cm across

Indoor size vs how big it gets in the wild

Cat's Jaws is a naturally small plant — it stays shelf- and desk-sized for its whole life, so it never becomes a space problem. Indoors and in a pot, expect 5–10 cm tall. In the ground with no restriction it is a completely different plant — clumps spread to 20–30 cm across — which is why the pot, the light and the pruning matter so much for the size you actually end up with.

It grows mostly by adding leaves, offsets or a slightly wider rosette rather than gaining height — the footprint barely changes year to year.

Growth rate and years to mature

Cat's Jaws 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 a dilute low-nitrogen cactus fertiliser (e.g. 5-10-10 at half strength) once in spring and again in early summer. do not feed in autumn and winter. overfeeding causes lax, atypical growth.

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

How to keep cat's jaws smaller

Good news — cat's jaws barely needs managing. If you do want to keep it tidy:

Divide or remove offsets when the pot looks crowded to keep cat's jaws to a single tidy clump.
Keeping it slightly pot-bound and easing back on feed naturally caps the size.
Pinch or remove the oldest, tiredest leaves so energy goes into a compact, fresh-looking plant.

How to grow cat's jaws bigger or faster

If you want it to fill the space sooner, push the conditions rather than hoping — for cat's jaws the accelerators are:

It is already in good light; consistent warmth and a balanced feed in spring and summer are the only levers.
A small step up in pot size every couple of years gives the roots a little more room without triggering a size jump.
Feed lightly through the growing season; this plant simply will not race however hard you push it.

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

When cat's jaws outgrows the room (or the pot)

"Too big" usually arrives as one of these signs for cat's jaws:

Roots circling the bottom or pushing out of the drainage hole — it wants a pot one size up, not a bigger room.
Offsets crowding the surface so the original plant looks squashed.
Honestly, cat's jaws rarely outgrows a room — outgrowing its pot is the only realistic limit.

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

Cat's Jaws size — frequently asked questions

How big does cat's jaws get?

Cat's Jaws reaches 5–10 cm tall when grown indoors, and far larger where it grows unrestricted (clumps spread to 20–30 cm across). It grows mostly by adding leaves, offsets or a slightly wider rosette rather than gaining height — the footprint barely changes year to year.

Is cat's jaws slow or fast growing?

Cat's Jaws is a moderate grower. Expect three to six years to reach mature indoor size, gaining a steady amount each growing season. Cat's Jaws is a naturally small plant — it stays shelf- and desk-sized for its whole life, so it never becomes a space problem.

How long does cat's jaws 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 cat's jaws smaller?

Divide or remove offsets when the pot looks crowded to keep cat's jaws to a single tidy clump. Keeping it slightly pot-bound and easing back on feed naturally caps the size. Pinch or remove the oldest, tiredest leaves so energy goes into a compact, fresh-looking plant.

How can I make cat's jaws grow bigger or faster?

It is already in good light; consistent warmth and a balanced feed in spring and summer are the only levers. A small step up in pot size every couple of years gives the roots a little more room without triggering a size jump. Feed lightly through the growing season; this plant simply will not race however hard you push it.