Photo: zebedeugalinhaCC BY 4.0via iNaturalistresized / cropped
Yellow Horned Poppy Plant Care
Glaucium flavum Crantz
Updated · Sources · How we source care data
This plant's distinctive grey-green, waxy leaves are what gives it its unique appearance. Originally hailing from the Mediterranean region, it is a popular choice among plant collectors for its striking foliage and ability to thrive in coastal climates.
Every 7–10 days
Full sun to partial shade
50–80°F
40–70%
At a glance
How do you care for Yellow Horned Poppy?
Water Yellow Horned 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 50–80°F (10–27°C) and 40–70% humidity. Fertilize it every 6 months during the growing season. It is reported as toxic to pets, so keep it out of reach of pets.
Where Is the Yellow Horned Poppy Native To?
- Albania
- Algeria
- Armenia
- Austria
- Azerbaijan
- Bahrain
- Belarus
- Belgium
- Bosnia and Herzegovina
- Bulgaria
- Croatia
- Cyprus
- Czechia
- Denmark
- Egypt
- Estonia
- Finland
- France
- Georgia
- Germany
- Greece
- Hungary
- Iceland
- Iran
- Iraq
- Ireland
- Israel
- Italy
- Jordan
- Kuwait
- Latvia
- Lebanon
- Libya
- Lithuania
- Luxembourg
- Malta
- Moldova
- Montenegro
- Morocco
- North Macedonia
- Norway
- Oman
- Palestine
- Poland
- Portugal
- Qatar
- Romania
- Russia
- Saudi Arabia
- Serbia
- Slovakia
- Slovenia
- Spain
- Sweden
- Switzerland
- Syria
- The Netherlands
- Tunisia
- Türkiye
- UAE
- Ukraine
- United Kingdom
- Yemen
What Is the Yellow Horned Poppy?
Yellow Horned Poppy (Glaucium flavum) belongs to the Papaveraceae family within the Glaucium genus. Yellow Horned Poppy is native to Europe, Northern Africa, Macaronesia and temperate zones in Western Asia. Yellow Horned Poppy is also known as Sea Poppy.
Yellow Horned Poppy displays an upright, branching perennial growth habit, reaching up to 2 ft tall with a spread of approximately 1.5 ft. Yellow Horned Poppy produces bright orange to yellow poppy-like flowers.
Leaf size: approximately 6 inches.
How Often Should You Water a Yellow Horned Poppy?
Glaucium flavum 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 Yellow Horned Poppy Need?
Yellow Horned Poppy thrives in full sun to partial shade.
Light Requirement
Full sun to partial shade
What Temperature and Humidity Does the Yellow Horned Poppy Prefer?
Glaucium flavum grows best at temperatures of 50–80°F. Yellow Horned Poppy prefers humidity levels of 40–70%.
Temperature
50–80°F
Humidity
40–70%
What Soil Mix Works Best for a Yellow Horned Poppy?
Well-draining sandy soil with good organic content. Good drainage is essential for Yellow Horned Poppy to prevent waterlogging, which leads to root rot and fungal issues.
How Often Should You Fertilize a Yellow Horned Poppy?
Feed Yellow Horned 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 Yellow Horned 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 Yellow Horned Poppy?
Yellow Horned Poppy can be propagated through seeds, division of rootball. Similar propagation techniques also apply to sharp-lobed horned poppy plant care, which shares the same genus.
Is the Yellow Horned Poppy Toxic to Pets and Children?
Toxic (caution)
Reported as toxic in our plant data. Not verified by the ASPCA.
Toxic to humans and pets
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 Yellow Horned Poppy?
Yellow Horned 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 Yellow Horned Poppy Need?
Yellow Horned Poppy grows outdoors in USDA Zone 6a – 9b. It survives winters down to planting zone 6a. Yellow Horned Poppy is native to Europe, Northern Africa, Macaronesia and temperate zones in Western Asia.
Hardiness Zone
Zone 6a – 9b
Keep exploring plants
Yellow Horned 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 Glaucium genus — compare its care with other Glaucium species on PlantoScan.
Glaucium is part of the Papaveraceae plant family — browse all Papaveraceae genera and species.
Yellow Horned Poppy thrives in bright light and direct sun — see other bright-light plants.
Related Plant Care Guides
Closely related plants with similar care requirements:
Sources
- Scientific name & taxonomy: Glaucium flavum Crantz, family Papaveraceae (first published in Stirp. Austr. Fasc. 2: 133 (1763)) — World Flora Online record, IPNI name record.
- Pet toxicity: Yellow Horned Poppy is reported as toxic to pets in our plant data (not verified by the ASPCA), so treat it with caution. 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 – 9b, 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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