About
Glaucium flavum, the yellow horned poppy, is 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 up to 30 cm long � the origin of the common name. A beautiful and ornamental plant for a sunny, well-drained coastal border.
About the genus
Glaucium, the horned poppies, are erect, often rosette-forming annuals, biennials and short-lived perennials with matt, blue-green or grey-green leaves and showy, poppy flowers followed by long, narrow, curving seed pods. Ornamental plants for sunny, well-drained positions.
Growing conditions
SunlightFull sun
Soil typeChalk, Loam, Sand
Soil pHAcid, Alkaline, Neutral
Soil moistureWell-drained
AspectSouth-facing, West-facing
ExposureExposed, Sheltered
UK hardinessH4
Plant details
Plant typeHerbaceous Perennial, Annual Biennial
HabitClump forming
FoliageDeciduous
Height0.5-1 metres
Spread0.1-0.5 metres
Time to full height1-2 years
Suggested usesCoastal, Cottage and informal garden, Gravel garden, Wildlife gardens, Wildflower meadow
Native toEurope Africa Asia
Care notes
CultivationGrow in poor to moderately fertile, well-drained soil in full sun. Resents root disturbance
PruningNo pruning required
PropagationSow seed in situ in spring or autumn
Pest resistanceGenerally pest-free
Disease resistanceGenerally disease-free