PlantFun
Plant Needs
Sunlight
Full sun to partial shade; tolerates dry, nutrient-poor soil conditions
Watering
Drought-tolerant; water only when the top 5–10 cm of soil is completely dry
Temperature
Hardy to USDA zones 4–10; withstands extreme winter cold and summer heat
Characteristics
- Leaf: Ovate to elliptical leaves with irregularly lobed margins, covered in fine hairs and small spines
- Flower: Star-shaped white to pale violet flowers with yellow stamens, clustered at stem tips
- Stem: Erect, branching stems armed with sharp, yellowish spines
- Fruit: Round, green to yellow-orange mature berries
Care Guide
Watering
Water occasionally during prolonged dry spells; avoid overwatering to prevent root rot
Fertilization
Optional diluted compost tea once monthly. No regular fertilization required; excessive nutrients may promote aggressive growth
Composted coffee grounds tea：Use fully composted grounds; dilute 1:20 with water for root drench; avoid applying undiluted grounds to prevent root burnPruning
- Wear thick gloves to avoid sharp stem spines during handling
- Remove spent flower heads to limit excessive self-seeding
- Cut back dead stems to ground level in late winter to promote new spring growth
- Pull unwanted seedlings when young to control spread in managed gardens
Toxicity
Warning: this plant may be toxic.
Pets & Humans
Pets: ASPCA: Toxic due to solanine; may cause vomiting, diarrhea, and abdominal pain
Humans: Contains solanine; ingestion causes oral irritation, nausea, and gastrointestinal distress
Garden Uses & Culture
Culture: N/A
Usage: N/A (often classified as a noxious weed)
