Glaucium flavum
yellow horned poppy
A short-lived perennial, usually grown as a biennial, forming a rosette of deeply-lobed, blue-green leaves. Branched, grey stems carry bright yellow or orange poppy flowers in summer, followed by long, narrow, upright seed pods
Synonyms
Glaucium flavum f. flavumGlaucium luteum
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Size
Ultimate height
0.5–1 metresTime to ultimate height
1–2 yearsUltimate spread
0.1–0.5 metresGrowing conditions
Moisture
Well–drainedpH
Acid, Alkaline, NeutralColour & scent
| Stem | Flower | Foliage | Fruit | |
| Spring | Blue Green | |||
|---|---|---|---|---|
| Summer | Orange Yellow | Blue Green | ||
| Autumn | Blue Green | |||
| Winter |
Position
- Full sun
Aspect
South–facing or West–facing
Exposure
Exposed or ShelteredDrought resistance
Yes Hardiness
H4Botanical details
- Family
- Papaveraceae
- Native to the UK
- Yes
- Foliage
- Deciduous
- Habit
- Clump forming
- Potentially harmful
- Roots are toxic if ingested. Wear gloves and wash hands after handling
- Genus
Glaucium are erect, often rosette-forming, annuals, biennials and short-lived perennials with matt, blue-green or grey-green leaves and showy, poppy flowers
- Name status
Correct
- Plant range
- Europe Africa Asia
How to grow
Cultivation
Grow in poor to moderately fertile, well-drained soil in full sun. Resents root disturbance
Propagation
Sow seed in situ in spring or autumn
Suggested planting locations and garden types
- Coastal
- Cottage and informal garden
- Gravel garden
- Wildlife gardens
- Wildflower meadow
- Flower borders and beds
Pruning
No pruning required
Pests
Generally pest-free
Diseases
Generally disease-free
Get involved
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