Corn Poppy (Papaver rhoeas)

Corn Poppy

Papaver rhoeas

Delicate crinkled blooms glow like scattered sunset embers. Annual flowering herb; common names: Flanders Poppy, Corn Poppy.

Full sun
1–2/week
Beginner
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Plant Needs

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Sunlight Requires full sun for prolific blooming; tolerates partial afternoon shade in hot, arid regions
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Watering Water deeply when the top 2–3 cm of soil is dry; avoid overwatering to prevent root rot
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Temperature Thrives in cool to temperate conditions; tolerates light spring frost but suffers in extreme heat above 30°C
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Characteristics

  • Leaf: Lobed, hairy basal leaves with serrated margins; stem leaves are smaller and clasping
  • Flower: Papery, crinkled petals in bright red (rarely pink/white) with a dark central blotch
  • Stem: Slender, hairy green stems containing milky sap
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Care Guide

Watering

Keep soil evenly moist during active growth; reduce watering as blooms fade

Fertilization

Light balanced feed once at planting. Over-fertilization can reduce blooming and promote excessive foliage growth

Eggshell powder top-dressing:Crush clean, dried eggshells into fine powder; sprinkle lightly around the base of plants to boost soil calcium levels and prevent stem collapse
Pruning
  • Deadhead spent blooms regularly to encourage extended flowering throughout the season
  • Remove yellowing or damaged foliage to maintain plant appearance and improve airflow
  • Cut back the entire plant after blooming to allow self-seeding for next year's growth
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Toxicity

Warning: this plant may be toxic.

Pets & Humans

Pets: ASPCA-verified non-toxic to cats; no adverse effects reported from ingestion or contact

Humans: No known toxicity to humans; safe for handling and consumption in small quantities

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Garden Uses & Culture

Culture: Symbol of remembrance for fallen soldiers in the Commonwealth, associated with the poem "In Flanders Fields"

Usage: Ornamental wildflower, cut flower for floral arrangements, and pollinator-friendly garden plant