PlantFun
Plant Needs
Sunlight
Requires full direct sunlight daily to maintain upright growth form; tolerates partial shade in extreme heat
Watering
Water deeply once weekly during active growth; allow soil to fully dry between waterings to prevent root rot
Temperature
Thrives in warm, arid conditions; protect from frost below 10°C to avoid stem damage
Characteristics
- Leaf: Small, obovate green leaves cluster at branch tips; drop rapidly during dry, hot periods
- Stem: Thick, ridged upright branches with paired sharp spines; exudes milky white sap when damaged
- Flower: Dense clusters of tiny yellow-green cyathia (false flowers) form at branch apexes
Care Guide
Watering
Water deeply when the top 10cm of soil is completely dry
Fertilization
Diluted balanced succulent feed once monthly. Cease fertilization during winter dormancy to prevent weak, leggy growth
Eggshell powder top-dress：Grind dried eggshells to a fine powder; sprinkle 1–2 tablespoons on the soil surface to boost calcium levels and improve soil drainagePruning
- Wear protective gloves to avoid sap contact when pruning
- Remove dead or damaged branches in early spring to maintain structural form
- Trim overgrown lateral branches to control size and encourage upright growth
Toxicity
Warning: this plant may be toxic.
Pets & Humans
Pets: ASPCA: Toxic; sap exposure leads to oral irritation, drooling, vomiting, and skin redness
Humans: Milky sap causes skin blistering, eye irritation, and oral pain if ingested or contacted
Garden Uses & Culture
Culture: Symbolizes resilience in arid landscapes; popular in xeriscape garden design
Usage: Ornamental architectural succulent; traditional medicinal uses are limited due to high sap toxicity
