Bittersweet Nightshade (Solanum dulcamara)

Bittersweet Nightshade

Solanum dulcamara

Vining stems carry delicate purple blooms, hiding toxic berries. Deciduous climbing perennial; common name: bittersweet nightshade.

Partial sun
1–2/week
Moderate
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Plant Needs

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Sunlight Bright indirect to partial sun; tolerates light shade, avoid intense midday sun to prevent leaf scorch
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Watering Water when the top 2–3 cm of soil is dry; avoid waterlogging to prevent root rot
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Temperature Hardy to -10°C; prefers temperate conditions, protect from extreme heat above 30°C
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Characteristics

  • Leaf: Ovate to lanceolate leaves, often with one or two basal lobes; glossy green
  • Flower: Star-shaped purple blooms with yellow stamens; clustered in loose cymes
  • Fruit: Oval berries, green ripening to bright red in late autumn
  • Stem: Slender, climbing stems with small tendrils for anchorage
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Care Guide

Watering

Keep soil evenly moist; avoid overwatering to prevent root rot

Fertilization

Feed with balanced diluted fertilizer every 2 weeks. Avoid fertilizing during winter dormancy to prevent nutrient buildup

Composted banana peel tea:Compost banana peels for 2–3 weeks, steep in water for 24 hours, dilute 1:20 for root drench to avoid burning roots
Pruning
  • Prune dead or damaged stems in early spring to encourage vigorous new growth
  • Trim overgrown vines to maintain desired shape and prevent tangling on trellises
  • Remove spent flower clusters to redirect energy to new bloom production
  • Cut back to ground level in late autumn in cold regions to protect root systems from frost damage
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Toxicity

Warning: this plant may be toxic.

Pets & Humans

Pets: ASPCA: Toxic; ingestion may cause vomiting, diarrhea, lethargy, and neurological signs

Humans: Contains solanine and tropane alkaloids; ingestion causes gastrointestinal and neurological distress

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Garden Uses & Culture

Culture: N/A

Usage: Ornamental climbing vine for trellises; historically used in herbal medicine (not recommended due to toxicity)