Long-headed Poppy (Papaver dubium)

Long-headed Poppy

Papaver dubium

Delicate crumpled blooms glow like sunset embers. Annual or biennial flowering herb; common name: Long-headed Poppy.

Full sun
1–2/week
Beginner
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Plant Needs

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Sunlight Full sun to partial shade; thrives in open, unshaded meadow or border sites; avoid dense shade
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Watering Water deeply when the top 2 cm of soil feels dry; tolerate short periods of drought but perform best with consistent moisture during flowering
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Temperature Hardy to mild frost (down to -10°C); prefers cool temperate growing conditions; avoid extreme heat above 30°C
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Characteristics

  • Leaf: Deeply lobed, fern-like basal leaves; smaller clasping stem leaves with sparse hairs
  • Flower: Bright orange-red crumpled petals with a dark basal spot; long, slender upright flower stalks
  • Stem: Slender, branching, hairy upright stems that exude milky sap when broken
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Care Guide

Watering

Keep soil evenly moist during active growth and flowering; avoid waterlogging to prevent root rot

Fertilization

Apply diluted balanced feed every 2 weeks during active growth. Use a low-nitrogen fertilizer to promote flower production over foliage growth

Composted coffee grounds tea:Brew fully composted coffee grounds in water at a 1:20 ratio; strain solids before applying as a root drench to avoid pest attraction and root burn
Pruning
  • Deadhead spent flower heads regularly to encourage extended blooming and prevent excessive self-seeding
  • Remove yellowing or diseased foliage promptly to improve airflow and reduce fungal disease risk
  • Cut back the entire plant to ground level after flowering to allow self-seeding for the next growing season
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Toxicity

Warning: this plant may be toxic.

Pets & Humans

Pets: ASPCA: Toxic; ingestion may cause vomiting, lethargy, decreased appetite, and mild sedation

Humans: Contains mild alkaloid toxins; ingestion may cause nausea, dizziness, or stomach upset in large quantities

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Garden Uses & Culture

Culture: Symbolizes remembrance and quiet resilience in some European folk traditions

Usage: Ornamental wildflower for meadow plantings; historically used in limited medicinal applications (regulated due to alkaloid content)