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Plant Profiles / African milk tree
Photos: Wikimedia Commons
African milk tree
Euphorbia trigona · Cathedral cactus
Tall, ribbed, candelabra-like stems with small leaves along the edges. A dramatic upright succulent for indoor pots.
Bright lightLight
Every 2 weeksWater
EasyCare level
Care at a glance
Light
Bright light
ShadeFull sun
Bright indirect or morning sun.
Water
Every 2 weeks
DryWet
Water when the mix is dry.
Humidity
Low to average
LowHigh
Adaptable.
Temperature
10–35°C (50–95°F)
CoolWarm
Frost tender.
Growth
Moderate, upright
SlowFast
Grows 1–2 m indoors.
Soil
Cactus and succulent mix
LeanRich
Free-draining mix in a heavy pot.
Fertiliser
Monthly in summer
RarelyOften
Diluted fertiliser.
Pet safety
Toxic
SafeToxic
Sap is toxic and irritating.
About this plant
Native to Central Africa, African milk tree looks like a cactus but is a euphorbia. The 'Rubra' form has red-tinged stems and leaves. Its sap is irritating.
Best spots
Bright living rooms, sunny corners and warm balconies.
Plant facts
| Botanical name | Euphorbia trigona |
| Family | Euphorbiaceae |
| Origin | Central Africa |
| Plant type | Succulent |
| Mature size | 1–2 m |
| Growth rate | Moderate |
| Flowers | Rarely flowers |
| Toxicity | Toxic to pets |
| Propagation | Stem cuttings |
Seasonal care calendar
J
F
M
A
M
J
J
A
S
O
N
D
Repot
Fertilise
Propagate
Water less
RepotFertilisePropagateWater less
Based on Southern Hemisphere seasons.
Troubleshooting
| Leaning | Rotate and stake. |
| Leaf drop | Normal in winter or after cold. |
| Brown corky patches | Older stems naturally harden. |
| Soft stems | Overwatering. |
Common questions
Is it a cactus?
No, it's a euphorbia.
Is it pet safe?
No.
How tall?
1–2 m indoors.
Does it need staking?
Tall plants may.
