Mature size & growth rate

How big does Curio Radicans (Curio radicans) get?

Also called string of bananas, necklace plant, banana strings.

More about curio radicans

About Curio Radicans

Curio radicans · also called string of bananas, necklace plant · houseplant

Curio radicans, the string of bananas (formerly Senecio radicans), is a vigorous South African trailing succulent with glossy, banana- or crescent-shaped leaves along fast-growing stems. Tougher and faster than its cousin string of pearls, it cascades dramatically from hanging baskets, thriving in bright light and lean, draining soil with infrequent watering. Easy to grow and very simple to propagate.

Mature size: Stems trail to 90 cm or more; spreads readily where nodes touch soil.

Watch for — Thin, sparse strands: Leggy growth with gaps between leaves means too little light. Move to a brighter spot for denser, plumper trails.

Indoor size vs how big it gets in the wild

Curio Radicans does not get tall — it gets long. Size here is about stem length and how you train or cut it, not how much floor it claims. Indoors and in a pot, expect stems trail to 90 cm or more. In the ground with no restriction it is a completely different plant — spreads readily where nodes touch soil. — which is why the pot, the light and the pruning matter so much for the size you actually end up with.

Growth shows up as lengthening stems that trail down or climb up a support; the plant can be kept tiny or grown metres long from the exact same root system.

Growth rate and years to mature

Curio Radicans is a fast grower. Realistically, expect one to three growing seasons — fast vines can add a metre or more of stem in a single good summer. Its feeding profile backs this up: feed once a month in spring and summer with a dilute, low-nitrogen succulent fertiliser at half strength. do not feed during the cooler, low-growth months.

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

How to keep curio radicans smaller

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

Trim the longest vines back to the length you want — curio radicans takes hard cutting well and bushes out from the cut.
Cut just above a leaf node; each trimmed stem usually branches into two, so pruning makes it fuller, not sparser.
The cuttings root easily in water or mix, so "keeping it smaller" doubles as free new plants.
Expect to tidy it every few weeks in summer — this is a fast vine that will sprawl if left.

The keep-it-smaller method, step by step

Decide the length you want. Pick the point each vine of curio radicans should stop — you can be aggressive; it regrows readily.
Cut just above a node. Snip about 0.5 cm above a leaf node so the stem branches there instead of dying back.
Root the cuttings. Drop the trimmed pieces in water or mix — they root in 2-4 weeks and can fill the same pot for a bushier look.
Repeat as it runs. Re-trim whenever it overshoots; regular light pruning keeps it both smaller and fuller.

How to grow curio radicans bigger or faster

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

Good light plus a moss pole or trellis triggers the longest, fastest, largest-leaved growth.
Give it something to climb — many vines grow far faster and bigger up a support than trailing.
Feed through spring and summer and keep it consistently watered while it is actively running.

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

When curio radicans outgrows the room (or the pot)

"Too big" usually arrives as one of these signs for curio radicans:

Vines pooling on the floor or wrapping past where you want them — purely a trimming cue, not a repot one.
Bare, leggy stems with leaves only at the tips (usually a light problem, not a size one).
A tangled mass that has outrun its support and needs cutting back and re-training.

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

Curio Radicans size — frequently asked questions

How big does curio radicans get?

Curio Radicans reaches stems trail to 90 cm or more when grown indoors, and far larger where it grows unrestricted (spreads readily where nodes touch soil.). Growth shows up as lengthening stems that trail down or climb up a support; the plant can be kept tiny or grown metres long from the exact same root system.

Is curio radicans slow or fast growing?

Curio Radicans is a fast grower. Expect one to three growing seasons — fast vines can add a metre or more of stem in a single good summer. Curio Radicans does not get tall — it gets long. Size here is about stem length and how you train or cut it, not how much floor it claims.

How long does curio radicans take to reach full size?

Roughly one to three growing seasons — fast vines can add a metre or more of stem in a single good summer. Light, pot size and feeding move that timeline more than anything else.

How do I keep curio radicans smaller?

Trim the longest vines back to the length you want — curio radicans takes hard cutting well and bushes out from the cut. Cut just above a leaf node; each trimmed stem usually branches into two, so pruning makes it fuller, not sparser. The cuttings root easily in water or mix, so "keeping it smaller" doubles as free new plants. Expect to tidy it every few weeks in summer — this is a fast vine that will sprawl if left.

How can I make curio radicans grow bigger or faster?

Good light plus a moss pole or trellis triggers the longest, fastest, largest-leaved growth. Give it something to climb — many vines grow far faster and bigger up a support than trailing. Feed through spring and summer and keep it consistently watered while it is actively running.