How to propagate string of bananas

Curio radicans

Propagate string of bananas by stem cutting. Roots in 14 to 28 days in soil. The cutting must include a node.

PREFERRED METHOD

stem cutting

Also possible: layering.

TIME TO ROOT

14–28 days

Roughly 2 to 4 weeks — fast for a houseplant. 69 of the 100 species in this database root more slowly.

NODE REQUIRED

Yes

A cutting without a node has no tissue that can become root and will rot instead.

MEDIUM

soil

Not a water-rooting species. Keep the medium barely damp rather than wet.

BEST SEASON

Spring and summer

Cuttings taken in active growth root faster and rot less than winter ones.

GROWTH HABIT

trailing

Habit is what decides which methods are available at all.

Why stem cutting works here

Roots form at the node — the slightly swollen point where a leaf meets the stem. That tissue can still turn into root tissue; the smooth stem between nodes cannot.

Doing it

Cut a few millimetres below a node with at least one leaf above it. Strip anything that would sit underwater. Put the node in the medium, the leaf in the light.

Where it goes wrong

A cutting with no node will sit green for weeks and then rot. It is the commonest way to waste a month.

The other routes

Slower or lower-yield for this species, but each has a case.

layering

A trailing stem left in contact with soil roots at the nodes on its own. You are just encouraging what it already does. Nothing much. It is the lowest-risk method there is, and the slowest.

Before you cut

The sap is not harmless. String of bananas is toxic to cats, dogs, and humans (pyrrolizidine alkaloids). Keep offcuts and rooting jars away from pets, and wash your hands. What that means for cats.
Take more than you need. Losses are normal. Three cuttings in one jar costs nothing extra and changes the odds.
Use a clean blade. Scissors crush the stem and crushed tissue rots. A craft knife wiped with alcohol is enough.
Do not fertilise a cutting. There are no roots to take it up, and the salts sit in the medium and burn what does form.

Also for this species

Full care entry — light, watering interval, soil recipe and difficulty, with sources. Toxicity to cats and to dogs.

Sources

Royal Botanic Gardens Kew, Plants of the World Online — Curio radicans Accepted name and family. Checked 2026-09-12.
ASPCA Animal Poison Control — Curio radicans Toxicity of sap and offcuts. Checked 2026-09-12.
Wikidata entity Q50840600

Compiled and edited by Tony Valcarcel · 2026-09-12
Rooting times are typical ranges for indoor conditions, not guarantees. Warmth and light move them more than anything you do to the cutting. How this is sourced.