African Milk Tree

Euphorbia trigonaAlso known as: Cathedral Cactus, Abyssinian Euphorbia, Good Luck Cactus

African Milk Tree is a dramatic, columnar succulent with three-sided stems lined with short thorns and tear-shaped leaves. Native to West Africa, it can grow up to 6 feet (1.8 m) indoors. Available in green or the striking 'Rubra' variety with red-tinged stems and leaves.

Easy Care

Bright Indirect Light

Perennial

Quick Care Summary

Light
Bright Indirect Light

Temperature Range
55-85°F (13-29°C)

Ideal Temp
70°F (21°C)

Toxic to Pets

This plant is toxic to cats and dogs if ingested. Keep it out of reach of pets, or consider pet-safe alternatives. Symptoms of ingestion may include drooling, vomiting, or difficulty swallowing.

Seasonal Care Schedule

Adjust your care routine based on the season for optimal plant health.

Watering Schedule

Season	Schedule
Spring	Every 10-14 days, when soil is dry
Summer	Every 7-10 days during active growth
Fall	Every 14-21 days
Winter	Every 3-4 weeks

More water-tolerant than true cacti but still prone to rot. Let soil dry between waterings.

Fertilizing Schedule

Season	Schedule
Spring	Monthly with diluted balanced fertilizer
Summer	Monthly
Fall	No fertilizing needed
Winter	No fertilizing needed

Light feeder. Over-fertilizing can cause weak, etiolated growth.

Pruning

Frequency: Rarely needed

Best Season: Spring

Wear gloves - sap is toxic. Can be topped to control height and encourage branching.

Repotting

Frequency: Every 2-3 years

Best Season: Spring

Use cactus/succulent soil. Choose a heavy pot to prevent toppling as plant grows tall.

Propagation Methods

Stem cuttings allowed to callous for several days
Plant in dry cactus mix
Handle with care - sap is irritating

Common Problems

Soft or mushy stems: Overwatering or root rot
Leaning: Growing toward light or top-heavy - rotate and stake
Leaf drop: Normal in winter or from underwatering
Corking at base: Natural aging - not a problem

Pro Tips

Sap is toxic and irritating - handle with gloves
Fast grower that can outgrow its space
'Rubra' variety has stunning red-purple coloration
Stake tall plants to prevent toppling

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