Opium Poppy (Papaver somniferum)

Opium Poppy

Papaver somniferum

Its crumpled blooms hold both beauty and controlled risk. Herbaceous annual; common names: opium poppy, breadseed poppy.

Full sun
1–2/week
Moderate
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Plant Needs

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Sunlight Requires full daily sun exposure to support robust growth and abundant flowering; avoid partial shade
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Watering Keep soil evenly moist during germination; reduce watering once established to prevent root rot
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Temperature Thrives in cool temperate conditions; avoid extreme heat above 28°C which can stunt flowering
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Characteristics

  • Leaf: Gray-green, lobed, hairy basal and stem leaves with a waxy coating
  • Flower: Large, crumpled papery blooms in white, pink, red, purple, or bi-colored forms
  • Stem: Erect, hairy stems that exude milky latex sap when cut
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Care Guide

Watering

Keep soil slightly moist during active growth season; avoid overwatering to prevent fungal issues

Fertilization

Diluted balanced liquid feed once every 2 weeks after seed germination. Use a low-nitrogen feed to prioritize flower development over leaf growth

Composted banana peel tea:Fully compost banana peels for 2 weeks, dilute at a 1:20 ratio with water for root drenching; avoid raw peels to prevent pest infestations
Pruning
  • Deadhead spent blooms to prevent unwanted self-seeding (regulated in many regions)
  • Remove yellowing lower leaves to improve airflow and reduce disease risk
  • Cut back entire stems to ground level after flowering to tidy garden beds
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Toxicity

Warning: this plant may be toxic.

Pets & Humans

Pets: ASPCA: Toxic due to alkaloid content; may cause gastrointestinal distress, lethargy, and tremors

Humans: Contains potent opiate alkaloids (morphine, codeine); ingestion can cause respiratory failure, coma, or fatal overdose

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Garden Uses & Culture

Culture: Symbolizes sleep, remembrance, and caution due to its dual ornamental and medicinal/psychoactive nature

Usage: Ornamental garden plant; non-opiate strains produce edible seeds for baking; historical source of opium for medicinal compounds