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Collector's item

Glaucium corniculatum

Glaucium corniculatum
Red horned poppy

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Beautiful native species much rarer than Glaucium flavum. This hairy plant forms a rosette of beautiful bluish-green leaves, from which leafy flower stalks emerge in spring bearing lovely orange-red cupped flowers with dark blotches. This red horned poppy is an annual or biennial plant that thrives in sandy or clayey soils that are markedly chalky, arid and in full sun. It self-seeds in favourable conditions.
Flower size
4 cm
Height at maturity
40 cm
Spread at maturity
40 cm
Exposure
Sun
Hardiness
Hardy down to -18°C
Soil moisture
Dry soil, Moist soil
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Best planting time March, October
Recommended planting time February to April, September to November
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Flowering time March to June
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Description

The Glaucium corniculatum, also known as the red horned poppy, is a beautiful wild plant that is sometimes found emerging from poor, sun-baked soil. Hairy all over, it forms a clump of beautifully cut, glaucous leaves that come to life in spring with large red-orange poppy flowers. This poppy only lives long enough to produce seeds, ensuring its continuity by self-seeding wherever suits it.

The Glaucium corniculatum belongs to the Papaveraceae family. This botanical species is found in southern Europe, Asia Minor, North Africa, and Central Asia. Its natural environment corresponds to arid wasteland, sandy hillsides, rocky areas, roadside edges, scrublands, and coastal areas. This poppy first develops a hairy, oblong, wavy, pennatilobed rosette of beautiful greyish-blue-green leaves. The whole measures 15 to 40 cm (15.7 in) in height. Flowering occurs from March to June depending on the climate. The flowers are solitary, 3 to 5 cm (2 in) wide, composed of satin-textured petals, ranging from orange-red to orange-yellow, adorned with a dark brownish-black spot at the base. The floral buds are very hairy, carried by an erect and branching hairy stem, with divided leaves covered with a bluish bloom, with incised edges. The fruit is a long, erect silique measuring 11 to 20 cm (7.9 in), resembling a horn, which releases its seeds as it dries out. In warmer areas, the plant germinates in autumn, holding onto its leaves over winter.

Glauciums were, until 50 years ago, very common on our sandy coasts, but these annual or biennial plants are now tending to decline sharply.  All the more reason to introduce them to our gardens, where they can roam to their heart's content. The red horned poppy thrives in rockeries and on arid slopes, in the company of other wild plants such as horned lotus, vetches, or California poppies. However, this plant does not like competition and is often found isolated in inhospitable places!

 

Glaucium corniculatum in pictures

Glaucium corniculatum (Flowering) Flowering
Glaucium corniculatum (Foliage) Foliage
Glaucium corniculatum (Plant habit) Plant habit

Flowering

Flower colour orange
Flowering time March to June
Flower size 4 cm

Foliage

Foliage persistence Semi-evergreen
Foliage colour grey or silver

Plant habit

Height at maturity 40 cm
Spread at maturity 40 cm
Growth rate very fast

Botanical data

Genus

Glaucium

Species

corniculatum

Family

Papaveraceae

Other common names

Red horned poppy

Origin

Southern Europe

Product reference4916451

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333
From €3.90 8/9 cm pot

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From €5.90 8/9 cm pot

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€1.80 Plug plant 1.5/2.5 cm
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From €5.90 7/8 cm pot

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52
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Planting and care

Growing Glaucium is easy in a scree garden, a large rockery, a sunny slope, in any sandy, rocky, rich or poor soil, whether chalky or not, but always very well-drained where they self-seed abundantly. 

16
€14.50 Each

Planting period

Best planting time March, October
Recommended planting time February to April, September to November

Intended location

Suitable for Meadow, Rockery
Type of use Border, Slope
Hardiness Hardy down to -18°C (USDA zone 7a) Show map
Ease of cultivation Amateur
Planting density 5 per m2
Exposure Sun
Soil pH Neutral, Calcareous
Soil type Chalky (poor, alkaline and well-drained), Clayey-chalky (heavy and alkaline), Silty-loamy (rich and light), Stony (poor and well-drained)
Soil moisture Dry soil, Moist soil, Well-drained

Care

Pruning No pruning necessary
Disease resistance Good
Overwinter Can be left in the ground

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