Glaucium flavum f. fulvum

RHS Plant Profile

tawny-yellow horned poppy

Synonyms

Glaucium flavum aurantiacum
Glaucium flavum orange-flowered

Herbaceous Perennial Annual Biennial

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A short-lived perennial, usually grown as a biennial, forming a rosette of deeply-lobed, blue-green leaves. Branched, grey stems carry papery orange poppy-like flowers in summer, followed by long, narrow, upright seed pods

Position

Full sun

Soil Types

Chalk, Loam, Sand

Size

Time to Maturity: 1–2 years

Growing Conditions

Chalk Loam Sand

Moisture: Well–drained
pH: Acid or Alkaline or Neutral

Position

Full sun

Aspect: South–facing or West–facing
Exposure: Exposed or Sheltered
Hardiness

Hardiness Ratings

All ratings refer to the UK growing conditions unless otherwise stated. Minimum temperature ranges (in degrees C) are shown in brackets

H1A: under glass all year (>15C)
H1B: can be grown outside in the summer (10 - 15)
H1C: can be grown outside in the summer (5 - 10)
H2: tolerant of low temperatures, but not surviving being frozen (1 to 5)
H3: hardy in coastal and relatively mild parts of the UK (-5 to 1)
H4: hardy through most of the UK (-10 to -5)
H5: hardy in most places throughout the UK even in severe winters (-15 to -10)
H6: hardy in all of UK and northern Europe (-20 to -15)
H7: hardy in the severest European continental climates (< -20): H4
Drought Resistance: Yes

Colour & Scent

Season	Stem	Flower	Foliage	Fruit
Spring
Summer
Autumn
Winter

Botanical Details

Family: Papaveraceae
Native to GB/Ireland: No
Foliage: Deciduous
Habit: Clump forming
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: Unresolved

How to Grow

Cultivation

Grow in poor to moderately fertile, well-drained soil in full sun. Resents root disturbance

Propagation

Propagate by seed in situ in spring or autumn

Suggested planting locations and garden types

Coastal
Cottage and informal garden
Gravel garden
Wildflower meadow
Wildlife gardens
Flower borders and beds

Pruning

No pruning required

Pests

Generally pest-free

Diseases

Generally disease-free