Overview
Glaucium flavum is a clump forming perennial in the genus Glaucium, part of the Papaveraceae family, with deciduous foliage. It typically grows around 0.6 m tall. Glaucium flavum grows best in full sun, and tolerates most soils and any pH. Its UK hardiness is rated H6. Suggested uses include city and courtyard gardens, coastal, cottage and informal garden, gravel garden, wildlife gardens, flower borders and beds, garden edging and underplanting of roses and shrubs. It is native to Albania, Algeria, Baleares, Belgium, Bulgaria, Canary Is., Corse, Denmark, East Aegean Is., France, Germany and Great Britain.
About
Glaucium flavum, the yellow horned poppy, yellow hornpoppy or sea poppy, is a summer flowering plant in the family Papaveraceae. It is native to Europe, Northern Africa, Macaronesia and temperate zones in Western Asia.
Wikipedia contributors, CC BY-SA 4.0 — Glaucium flavum
About the genus
Glaucium is a genus of about 25 species of annual, biennial or perennial herbaceous flowering plants in the family Papaveraceae, native to Europe, north Africa, and southwest and central Asia. The species commonly occur in saline habitats, including coasts and salt pans.
Wikipedia contributors, "Glaucium", CC BY-SA 4.0 — Glaucium
Growing conditions
Best soil and position for Glaucium
- Sunlight
- Full sun
- Soil type
- Chalk, Loam, Sand
- Soil pH
- Acid, Alkaline, Neutral
- Soil moisture
- Well-drained
- Aspect
- South-facing, West-facing
- Exposure
- Exposed, Sheltered
- UK hardiness
- H6
Plant details
Glaucium flavum size, habit and characteristics
- Plant type
- perennial
- Habit
- Clump forming
- Foliage
- Deciduous
- Height
- 0.6 m
- Suggested uses
- City and courtyard gardens, Coastal, Cottage and informal garden, Gravel garden, Wildlife gardens, Flower borders and beds, Garden edging, Underplanting of roses and shrubs
- Native to
- Albania, Algeria, Baleares, Belgium, Bulgaria, Canary Is., Corse, Denmark, East Aegean Is., France, Germany, Great Britain
- Toxicity
- All parts of the plant, including the seeds, are toxic.
Care notes
Pruning and caring for Glaucium flavum
- Cultivation
- Prefers full sun and well-drained soil; tolerant of coastal conditions; drought tolerant once established.
- Pruning
- Remove spent flowers to encourage further blooming; cut back in late autumn or early spring to tidy.
- Propagation
- Seed in situ in spring or autumn
- Pest resistance
- Generally pest-free
- Disease resistance
- Generally disease-free
Frequently asked questions
How do I grow Glaucium flavum?
Prefers full sun and well-drained soil; tolerant of coastal conditions; drought tolerant once established.
Where is the best place to plant Glaucium flavum?
Glaucium flavum prefers full sun. It suits exposed and sheltered positions.
What soil does Glaucium flavum need?
Glaucium flavum is adaptable and grows happily in most soil types, including chalk, loam and sand. It is happy in soil of any pH. Aim for soil that stays well-drained.
How do I prune Glaucium flavum?
Remove spent flowers to encourage further blooming; cut back in late autumn or early spring to tidy.
How big does Glaucium flavum grow?
Glaucium flavum reaches a height of 0.6 m.
Is Glaucium flavum hardy in the UK?
Glaucium flavum has an RHS hardiness rating of H6, meaning it is very hardy, tolerating -20 to -15°C across most of the UK.
How do I propagate Glaucium flavum?
Seed in situ in spring or autumn.
Is Glaucium flavum toxic?
All parts of the plant, including the seeds, are toxic.