PlantFun
Plant Needs
Sunlight
Full sun to partial shade; thrives in hot, dry conditions and tolerates coastal salt spray
Watering
Allow soil to dry completely between waterings; avoid overwatering to prevent root rot
Temperature
Hardy to 5°C; protect from hard frosts; optimal growth occurs at 15–28°C
Characteristics
- Leaf: Narrow linear leaves, 2–5 cm long, bright green, arranged alternately along stems
- Flower: Small yellow cyathia (false flowers) in terminal clusters, lacking true petals
- Stem: Green, ribbed stems with distinct winged ridges; exudes milky white sap when broken
- Fruit: Winged capsules, 5–8 mm wide, containing small brown seeds
Care Guide
Watering
Water deeply once weekly when top 5 cm of soil is dry
Fertilization
Diluted balanced liquid feed once monthly. Use low-nitrogen fertilizer to promote compact growth and flowering
Eggshell powder topdressing：Sprinkle finely crushed, dried eggshells on soil surface to boost calcium levels and improve drainage; avoid mixing raw shells to prevent odorPruning
- Prune faded flower heads after blooming to encourage bushier growth
- Trim back leggy stems in early spring to maintain a compact rounded shape
- Wear protective gloves to avoid contact with irritating milky sap during pruning
Toxicity
Warning: this plant may be toxic.
Pets & Humans
Pets: ASPCA-listed toxic; milky sap irritates mouth, skin, and gastrointestinal tract
Humans: Milky sap causes mild skin irritation, eye redness, and oral discomfort if ingested
Garden Uses & Culture
Culture: N/A
Usage: Ornamental for dry borders, rock gardens, and coastal landscapes; suitable for low-water xeriscaping
