Troubleshooting
African Milk Tree problems — and how to fix them
African Milk Tree (Euphorbia trigona) is generally forgiving once you match its basics, but a few issues come up again and again. Here is what each one looks like, why it happens, and the fix.
Soft, yellowing or mushy stems (root/stem rot)
Almost always overwatering or poor drainage. Let the mix dry out between waterings, use a gritty cactus soil and a pot with drainage holes; remove rotted sections and re-root a healthy cutting if the base is lost.
Pale, thin, stretched growth (etiolation)
A sign of too little light. The stems elongate and lean toward the window. Move to a brighter spot with some direct sun, rotating the plant for even growth, or add a grow light.
Skin and eye irritation from the sap
Cut or broken stems ooze a toxic milky white latex. Wear gloves and eye protection when pruning or propagating, keep sap off skin and well away from eyes, and wash exposed skin promptly; seek medical care for eye contact.
Mealybugs and spider mites
Watch for white cottony tufts in stem crevices or fine webbing and stippling. Wipe off with a cotton swab dipped in diluted alcohol or treat with insecticidal soap or horticultural oil, and isolate the plant until clear.
Corky brown patches or sunscald
Sudden moves into intense direct sun can scorch stems, and old growth may develop harmless corky brown patches. Acclimate to brighter light gradually over a couple of weeks.
Toppling or leaning with height
Fast top-heavy growth in a light pot can make tall plants tip over. Use a heavier or wider container, repot as needed, and tip-prune to encourage branching and a sturdier shape.
Prevent african milk tree problems before they start
Most african milk tree issues are care-mismatch, not bad luck. Dial in the basics:
African Milk Tree problems — FAQ
Why is my african milk tree soft, yellowing or mushy stems (root/stem rot)?
Almost always overwatering or poor drainage. Let the mix dry out between waterings, use a gritty cactus soil and a pot with drainage holes; remove rotted sections and re-root a healthy cutting if the base is lost.
Why is my african milk tree pale, thin, stretched growth (etiolation)?
A sign of too little light. The stems elongate and lean toward the window. Move to a brighter spot with some direct sun, rotating the plant for even growth, or add a grow light.
Why is my african milk tree skin and eye irritation from the sap?
Cut or broken stems ooze a toxic milky white latex. Wear gloves and eye protection when pruning or propagating, keep sap off skin and well away from eyes, and wash exposed skin promptly; seek medical care for eye contact.
Why is my african milk tree mealybugs and spider mites?
Watch for white cottony tufts in stem crevices or fine webbing and stippling. Wipe off with a cotton swab dipped in diluted alcohol or treat with insecticidal soap or horticultural oil, and isolate the plant until clear.
Why is my african milk tree corky brown patches or sunscald?
Sudden moves into intense direct sun can scorch stems, and old growth may develop harmless corky brown patches. Acclimate to brighter light gradually over a couple of weeks.
Why is my african milk tree toppling or leaning with height?
Fast top-heavy growth in a light pot can make tall plants tip over. Use a heavier or wider container, repot as needed, and tip-prune to encourage branching and a sturdier shape.