How to propagate african milk tree

Euphorbia trigona

Propagate african milk tree by stem cutting. Roots in 21 to 42 days in soil. No node needed.

PREFERRED METHOD

stem cutting

The only method that works reliably for this species.

TIME TO ROOT

21–42 days

Roughly 3 to 6 weeks — middling for a houseplant. 14 of the 40 species in this database root more slowly.

NODE REQUIRED

Roots form from the cut tissue itself, so there is no node to find.

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

upright

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.

DISPLAY — in-content responsive

Before you cut

The sap is not harmless. African milk tree is toxic to cats, dogs, and humans (diterpene esters in the latex). 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

Missouri Botanical Garden Plant Finder — Euphorbia trigona Cultivation and propagation notes. Checked 2026-09-11.
Royal Botanic Gardens Kew, Plants of the World Online — Euphorbia trigona Accepted name and family. Checked 2026-09-11.
ASPCA Animal Poison Control — Euphorbia trigona Toxicity of sap and offcuts. Checked 2026-09-11.
Wikidata entity Q1257890

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.