Mature size & growth rate

How big does String of Fishhooks (Curio radicans 'Fishhook') get?

Also called Fishhook Senecio.

More about string of fishhooks

About String of Fishhooks

Curio radicans 'Fishhook' · also called Fishhook Senecio · houseplant

String of Fishhooks is a trailing succulent, Curio radicans, with curved blue-green leaves shaped like tiny hooks along long, fast-growing stems. Tougher and more forgiving than string of pearls, it stores water in its leaves and produces small white, cinnamon-scented flowers. Give it bright light, gritty soil, and infrequent deep watering.

Mature size: Trailing stems reach 0.6-1.5 m; leaves about 2-3 cm long.

Watch for — Leggy stretched growth: Too little light spaces out the leaves. Move to a brighter spot and trim long stems to encourage fullness.

Indoor size vs how big it gets in the wild

String of Fishhooks 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 trailing stems reach 0.6-1.5 m. In the ground with no restriction it is a completely different plant — leaves about 2-3 cm long. — 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

String of Fishhooks 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 half-strength balanced or cactus fertiliser. it is a light feeder; excess nitrogen causes soft, stretched stems. no feeding in autumn or winter.

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

How to keep string of fishhooks smaller

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

Trim the longest vines back to the length you want — string of fishhooks 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 string of fishhooks 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 string of fishhooks bigger or faster

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

When string of fishhooks outgrows the room (or the pot)

"Too big" usually arrives as one of these signs for string of fishhooks:

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

String of Fishhooks size — frequently asked questions

How big does string of fishhooks get?

String of Fishhooks reaches trailing stems reach 0.6-1.5 m when grown indoors, and far larger where it grows unrestricted (leaves about 2-3 cm long.). 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 string of fishhooks slow or fast growing?

String of Fishhooks 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. String of Fishhooks 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 string of fishhooks 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 string of fishhooks smaller?

Trim the longest vines back to the length you want — string of fishhooks 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 string of fishhooks 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.