Photo: zebedeugalinhaCC BY 4.0via iNaturalistresized / cropped
Long-headed Poppy Plant Care
Papaver dubium L.
Updated · Sources · How we source care data
With its deeply lobed, gray-green leaves, Papaver dubium originates from Europe and North Africa. Plant collectors are drawn to this species for its vibrant orange or red flowers and ability to self-seed, making it a low-maintenance addition to any garden.
Every 7–10 days
Full sun to partial shade
50–75°F
40–60%
At a glance
How do you care for Long-headed Poppy?
Water Long-headed Poppy every 7–10 days, letting the top layer of soil dry out between waterings, and give it full sun to partial shade. It prefers temperatures of 50–75°F (10–24°C) and 40–60% humidity. Fertilize it every 6 months during the growing season.
Where Is the Long-headed Poppy Native To?
- Albania
- Algeria
- Austria
- Belarus
- Belgium
- Bosnia and Herzegovina
- Bulgaria
- Croatia
- Cyprus
- Czechia
- Denmark
- Egypt
- Estonia
- Finland
- France
- Germany
- Greece
- Hungary
- Iceland
- Ireland
- Italy
- Latvia
- Libya
- Lithuania
- Luxembourg
- Malta
- Moldova
- Montenegro
- Morocco
- North Macedonia
- Norway
- Poland
- Portugal
- Romania
- Russia
- Serbia
- Slovakia
- Slovenia
- Spain
- Sweden
- Switzerland
- The Netherlands
- Tunisia
- Ukraine
- United Kingdom
What Is the Long-headed Poppy?
Long-headed Poppy (Papaver dubium) belongs to the Papaveraceae family within the Papaver genus. Long-headed Poppy is native to Europe, North Africa and south-western Asia and widespread as an introduction in America and else. Long-headed Poppy is also known as Rough Poppy, Weedy Poppy.
Long-headed Poppy displays an upright, clumping perennial growth habit, reaching up to 2 ft tall with a spread of approximately 1.5 ft. Long-headed Poppy produces large, colorful bowl-shaped flowers in shades of red, orange, pink, or white.
Leaf size: approximately 4 inches.
How Often Should You Water a Long-headed Poppy?
Papaver dubium requires watering every 7–10 days. Allow the top layer of soil to dry between waterings to prevent root rot. Reduce watering frequency during winter when growth slows.
Watering Frequency
Every 7–10 days
Let soil partially dry between waterings
What Light Does the Long-headed Poppy Need?
Long-headed Poppy thrives in full sun to partial shade.
Light Requirement
Full sun to partial shade
What Temperature and Humidity Does the Long-headed Poppy Prefer?
Papaver dubium grows best at temperatures of 50–75°F. Long-headed Poppy prefers humidity levels of 40–60%.
Temperature
50–75°F
Humidity
40–60%
What Soil Mix Works Best for a Long-headed Poppy?
Well-draining, fertile soil with good organic content. Good drainage is essential for Long-headed Poppy to prevent waterlogging, which leads to root rot and fungal issues.
How Often Should You Fertilize a Long-headed Poppy?
Feed Long-headed Poppy every 6 months during the growing season (spring and summer) with a balanced fertilizer diluted to the strength on the label.
Pause feeding in autumn and winter, when growth slows, and never fertilize dry soil — water first.
Fertilizing
Every 6 months
During the growing season
The PlantoScan app can remind you when to water and when to fertilize each plant.
How Do You Repot a Long-headed Poppy?
Repot every 2-3 years in early spring. Choose a pot one size larger than the current container, and ensure it has drainage holes to allow excess water to escape.
How Do You Propagate a Long-headed Poppy?
Long-headed Poppy can be propagated through seeds. Similar propagation techniques also apply to iceland poppy plant care, which shares the same genus.
Is the Long-headed Poppy Toxic to Pets and Children?
Pet safety not verified
The ASPCA does not list Long-headed Poppy, so we can't confirm whether it is safe for cats and dogs. Keep pets from chewing it as a precaution.
This is a general caution, not veterinary or medical advice. If your pet ate a plant, contact your vet or animal poison control.
See all plants toxic to cats and plants toxic to dogs.
What Pests and Diseases Affect the Long-headed Poppy?
Long-headed Poppy is susceptible to aphids, slugs, snails. Inspect the foliage regularly, especially along leaf undersides and stems. Treat infestations promptly with insecticidal soap or neem oil to prevent spread.
Yellow leaves, brown tips or drooping? See common plant problems and how to fix them.
What USDA Hardiness Zone Does the Long-headed Poppy Need?
Long-headed Poppy grows outdoors in USDA Zone 6a – 10b. It survives winters down to planting zone 6a. Long-headed Poppy is native to Europe, North Africa and south-western Asia and widespread as an introduction in America and else.
Hardiness Zone
Zone 6a – 10b
Keep exploring plants
Long-headed Poppy is one of many species covered in the complete plant care and identification guide, which groups plants by genus, attribute, and popularity.
It belongs to the Papaver genus — compare its care with other Papaver species on PlantoScan.
Papaver is part of the Papaveraceae plant family — browse all Papaveraceae genera and species.
Long-headed Poppy thrives in bright light and direct sun — see other bright-light plants.
More Papaver Species
Other Papaver species in PlantoScan's care catalogue share similar watering, light, and soil preferences:
Sources
- Scientific name & taxonomy: Papaver dubium L., family Papaveraceae (first published in Sp. Pl. : 1196 (1753)) — World Flora Online record, IPNI name record.
- Pet toxicity: Pet safety not verified: the ASPCA does not list Long-headed Poppy, so we can't confirm whether it is safe for cats and dogs. Checked against the ASPCA plant list; any other toxicity note on this page comes from PlantoScan's plant database.
- Photo: zebedeugalinha, CC BY 4.0, iNaturalist — original.
- Hardiness zone: USDA Zone 6a – 10b, estimated from the plant's typical growing conditions.
- Care values(watering, light, temperature, humidity, soil, fertilizing): PlantoScan's plant database, filtered by automatic plausibility checks — values that fail them are hidden. How we source and check plant data.
Spotted a mistake? Email info@upvision.media with the page link — we check and correct reported errors.
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