Papaveraceae
Long-headed Poppy (Papaver dubium)
Papaver dubium
Easy annual for outdoor gardens. Thrives in full sun with sandy, well-drained soil. Moderately drought-tolerant; does not withstand waterlogging. Direct-sow in spring.
Every 7 days
Direct sun
5° - 25°C
40% - 60%
Categories
What is Long-headed Poppy?
Long-headed Poppy (Papaver dubium) is a easy-care plant from the Papaveraceae family. Papaver dubium, commonly known as the long-headed poppy or blindeyes, is a slender annual native to Europe and North Africa. It is identified by its elongated seed capsule and pale red to pink petals lacking dark basal spots. All plant parts except mature seeds contain toxic alkaloids, making it har...
Long-headed Poppy grows up to 60cm, with spread of 30cm, watering every 7 days, 5°C – 25°C, 40–60% humidity. It is not suitable for indoor environments and not safe for pets.
Unlike many tropical plants, Long-headed Poppy tolerates watering mistakes. Best for beginners. Without precautions, ingestion can cause irritation in pets. Keep out of reach of cats and dogs.
How to Care for Long-headed Poppy?
TLDR: Long-headed Poppy needs Direct sun, watering every 7 days, and temperatures between 5-25°C with 40-60% humidity.
How Often Should You Water Long-headed Poppy?
Water every 7 days or when soil is almost completely dry. Avoid overwatering — susceptible to root rot. Reduce watering frequency in cooler months.
How Much Light Does Long-headed Poppy Need?
Requires full sun with a minimum of 6 hours of direct sunlight daily. Shade will inhibit flowering and weaken the plant.
What Is the Best Soil for Long-headed Poppy?
Prefers sandy or sandy-loam, well-drained soil with a slightly acidic to neutral pH (6.0–7.5). Avoid heavy clay soils that retain moisture.
What Pot Should You Use for Long-headed Poppy?
Outdoor beds, wildflower borders and cottage gardens. Not suitable for containers.
What Is Long-headed Poppy and Where Does It Come From?
Papaver dubium, commonly known as the long-headed poppy or blindeyes, is a slender annual native to Europe and North Africa. It is identified by its elongated seed capsule and pale red to pink petals lacking dark basal spots. All plant parts except mature seeds contain toxic alkaloids, making it harmful to humans, cats, and dogs.
How to Propagate Long-headed Poppy?
Direct sowing
Do not transplant — long-headed poppy does not tolerate root disturbance. Sow directly where it will grow. Plants often self-sow freely in subsequent years.
- 1 Prepare sandy, well-drained soil in a sunny location
- 2 Sow seeds directly in their final position in spring
- 3 Lightly cover seeds with a thin layer of soil
- 4 Keep soil slightly moist until germination
- 5 Thin seedlings to 20-30 cm apart once established
Materials needed:
How Big Does Long-headed Poppy Grow?
TLDR: Long-headed Poppy can reach up to 60cm tall with Fast growth rate.
Max height
60cm
Spread
30cm
Growth rate
Fast
Foliage
Deciduous
Warning: Toxic Plant
This plant can be toxic if ingested. Keep out of reach of:
Plant Uses
Ornamental
Great for decoration
Medicinal
Medicinal properties
Medicinal Uses
- Diaphoretic (sudorific) properties; used in traditional European folk medicine
Is your plant showing symptoms?
Click on the symptom to discover possible causes:
What Diseases Commonly Affect Long-headed Poppy?
TLDR: Long-headed Poppy is susceptible to 4 known diseases. Monitor regularly for early detection.
Powdery Mildew
Powdery mildew is a common fungal disease caused by various fungi species including Erysiphe, Podosphaera, Oïdium, and Leveillula. It affects over 10,000 plant species worldwide. The disease thrives in warm, dry climates with high humidity and appears as a distinctive white powdery coating on plant surfaces.
Root Rot
Root rot is a serious fungal disease that affects the root system of plants, causing them to decay and die. It is primarily caused by overwatering, poor drainage, or soil-borne fungi such as Pythium, Phytophthora, Rhizoctonia, and Fusarium. The disease thrives in waterlogged conditions where roots are deprived of oxygen, making them susceptible to fungal infection.
Aphids
Aphids are small, soft-bodied, pear-shaped insects (1/16 to 1/8 inch long) that feed by sucking nutrient-rich sap from plants. They reproduce rapidly and can quickly weaken plants, causing distorted growth and transmitting plant viruses. Aphids come in various colors including green, black, red, yellow, brown, and gray. They secrete honeydew, a sticky substance that attracts ants and encourages sooty mold growth.
Spider Mites
Spider mites are tiny arachnids (less than 1/20 inch long) related to spiders and ticks that feed on plant sap. They thrive in hot, dry conditions and can cause significant damage to ornamental and vegetable plants. During severe infestations, crop losses can reach 14% or higher as these pests disrupt vital plant processes including photosynthesis, carbon dioxide absorption, and transpiration.
Meaning & Symbolism
Associated with remembrance, sleep, and eternal rest. In European tradition, the poppy is a symbol of memory for the fallen.
Fun Facts
It produces a white to yellowish latex when stems are broken — a hallmark of the Papaveraceae family
The elongated capsule is more than twice as tall as it is wide, distinguishing it from the common poppy (Papaver rhoeas)
It can build a persistent seed bank in the soil, germinating years later when soil is disturbed
The species is pollinated by bees, flies and beetles, and is also capable of self-pollination
Frequently asked questions
Is the long-headed poppy toxic?
How do I grow Papaver dubium from seed?
How much sun does it need?
How often should I water?
Can I grow it in a pot?
Compare with similar plants
| Attribute | Difficulty | Light | Watering | Pet Safe |
|---|---|---|---|---|
| Peace Lily | Easy | Low light | 4d | ⚠️ |
| Swiss Cheese Plant | Easy | Partial shade | 10d | ⚠️ |
| Golden Pothos | Easy | Low light | 8d | ⚠️ |
| ZZ Plant | Easy | Low light | 18d | ⚠️ |
