PlantFun
Plant Needs
Sunlight
Partial to full sun; tolerates dappled shade in woodland undergrowth
Watering
Water deeply when top 5 cm of soil is dry; drought-tolerant once established
Temperature
Hardy to -20°C; withstands hot summer temperatures in native eastern North American range
Characteristics
- Leaf: Round to ovate, glossy green, 5–10 cm wide, with smooth margins
- Stem: Woody, armed with sharp recurved thorns for climbing and anchorage
- Flower: Small, greenish-yellow, clustered in axillary umbels
- Fruit: Dark blue-black berries, persistent through autumn and winter
Care Guide
Watering
Keep soil moderately moist during active growth periods
Fertilization
Light, diluted feed once monthly. Use balanced, low-strength feed to support foliage and flower development
Eggshell powder topdress：Crush dried eggshells into fine powder; sprinkle 1–2 tbsp around base of vines to supplement soil calciumPruning
- Trim overgrown stems in late winter to control spread and maintain desired shape
- Remove dead or damaged vines to improve airflow and reduce pest habitat
- Cut back to ground level every 2–3 years to rejuvenate dense, overgrown plants
Toxicity
Warning: this plant may be toxic.
Pets & Humans
Pets: ASPCA: Non-toxic; no adverse effects reported from ingestion
Humans: No toxic compounds identified; minor puncture risk from thorns only
Garden Uses & Culture
Culture: N/A
Usage: Wildlife food source for birds; cover for small mammals; traditional medicinal uses for root extracts
