Blackspot Hornpoppy

Glaucium corniculatum

Native to:
Algeria, Australia, Baleares, Bulgaria, Canary Is., Corse, Cyprus, Egypt, France, Greece, Hungary, Iran, Iraq, Italy, Kazakhstan, Kirgizstan, Kriti, Krym, Kuwait, Lebanon-Syria, Libya, Madeira, Morocco, North Caucasus, NW. Balkan Pen., Palestine, Portugal, Romania, Russia, Sardegna, Saudi Arabia, Sicilia, Sinai, Spain, Transcaucasus, Tunisia, Türkiye, Türkiye-in-Europe, Turkmenistan, Ukraine

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Taxonomy

Division:
Magnoliophyta | - Flowering plants
Family:
Papaveraceae
Genus:
Glaucium
Species:
Glaucium corniculatum
USDA Symbol:
GLCO3

Growth Characteristics

Life Cycle:
Annual
Growth Habit:
Forb/herb
Height:
50 cm
Light Requirements:
Full Sun
Drought Tolerance:
High
Bloom Months:
may,jun,jul,aug
Bloom Colors:
red, orange, yellow

Garden & Ecology Notes

Wildlife Value:
bees
Deer Resistant:
Yes
Salt Tolerant:
Yes

Soil Requirements

Soil Type:
dry, sandy, well-drained soil
pH:
6.0 - 8.0 (neutral to slightly alkaline)
Drainage:
excellent drainage required
Moisture:
dry to moderate
Notes:
prefers open, sunny habitats

Propagation & Germination

Stratification:
Cold/moist stratification required — 14–30 days
Germination Time:
14–30 days
Notes:
Seeds germinate best with light exposure and cool temperatures. Often erratic germination.

The above propagation data sourced from Claude AI

ORGHPS Germination Guide: Sow @ 20C. If no germination in 3 months, try 4C 1-2 months, then 20C again.

Source: Ontario Rock Garden & Hardy Plant Society