Black Nightshade (Solanum nigrum)

Black Nightshade

Solanum nigrum

Its tiny white blooms cluster like star dust, hiding glossy black berries. Herbaceous annual; common name: black nightshade.

Partial sun
1–2/week
Beginner
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Plant Needs

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Sunlight Full to partial sun; tolerates partial shade but produces fewer berries; avoid dense, full shade
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Watering Water when the top 2 cm of soil is dry; avoid overwatering to prevent root rot and fungal growth
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Temperature Thrives in temperate to warm conditions; protect from frost as it cannot tolerate freezing temperatures
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Characteristics

  • Leaf: Simple, ovate to lanceolate leaves with smooth or slightly toothed margins; medium green, soft texture
  • Flower: Small, star-shaped white flowers in umbellate clusters
  • Fruit: Glossy black, spherical berries when mature; unripe green berries are toxic
  • Stem: Erect, branching, slightly hairy green stems
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Care Guide

Watering

Keep soil consistently moist but not waterlogged; increase frequency during hot, dry spells

Fertilization

Diluted balanced liquid feed every 2 weeks. Discontinue fertilization in late autumn as growth slows

Composted coffee grounds tea:Steep fully composted coffee grounds in water for 24 hours, dilute 1:20 for root drench; avoid raw grounds to prevent soil pH imbalance
Pruning
  • Pinch back young stems to encourage bushier, more compact growth
  • Remove yellowing or diseased leaves promptly to maintain plant health
  • Deadhead spent flower clusters to promote additional blooming
  • Thin overcrowded branches to improve airflow and reduce disease risk
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Toxicity

Warning: this plant may be toxic.

Pets & Humans

Pets: ASPCA: Toxic due to solanine content; ingestion may cause systemic distress

Humans: Unripe berries contain solanine, causing gastrointestinal distress; ripe berries may cause mild upset in large quantities

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Garden Uses & Culture

Culture: N/A

Usage: Ornamental ground cover; ripe berries (in controlled, verified quantities) used in limited traditional culinary applications