Euphorbia vs. Cactus: Identifying and Treating Cold Damage in Milky-Sapped Succulents

Case: 8-Year Multi-Branch Succulent Dropped Twice

3×3 ft potted plant with 4" trunk, milky sap, browning branches after two drops during temperature fluctuations. Owner fears loss.

Critical Identification: Euphorbia, Not Cactus

• Milky white latex = Euphorbia (toxic sap)
• Cacti have clear sap
• Euphorbias: Cold-sensitive, rot-prone

Damage Assessment

• Spine punctures: Should heal if no cold exposure
• Browning branches: Could be cold damage (below 40°F)
• Milky sap: Normal defense response

Monitoring Protocol

1. Wait 2-3 weeks - observe progression
2. Improving = mechanical damage only
3. Worsening = cold/rot involvement
4. Report back with status update

Safety Note

Euphorbia latex causes severe rash, blindness risk. Wear gloves, eye protection during any handling.