Sea Poppy, Horned Poppy, Yellow Horned Poppy 'Extra'

Glauciumflavum

Family
Papaveraceae (pa-pav-er-AY-see-ee)
Genus
Glaucium (GLAH-see-um)
Species
flavum (FLA-vum)
Synonym
Sun Exposure
Full Sun
Height
12-18 in. (30-45 cm)
18-24 in. (45-60 cm)
Spacing
18-24 in. (45-60 cm)
24-36 in. (60-90 cm)
Hardiness
USDA Zone 4a: to -34.4 °C (-30 °F)
USDA Zone 4b: to -31.6 °C (-25 °F)
USDA Zone 5a: to -28.8 °C (-20 °F)
USDA Zone 5b: to -26.1 °C (-15 °F)
USDA Zone 6a: to -23.3 °C (-10 °F)
USDA Zone 6b: to -20.5 °C (-5 °F)
USDA Zone 7a: to -17.7 °C (0 °F)
USDA Zone 7b: to -14.9 °C (5 °F)
USDA Zone 8a: to -12.2 °C (10 °F)
USDA Zone 8b: to -9.4 °C (15 °F)
USDA Zone 9a: to -6.6 °C (20 °F)
USDA Zone 9b: to -3.8 °C (25 °F)
USDA Zone 10a: to -1.1 °C (30 °F)
USDA Zone 10b: to 1.7 °C (35 °F)
Danger
All parts of plant are poisonous if ingested
Bloom Color
Bright Yellow
Bloom Time
Late Spring/Early Summer
Mid Summer
Other Details
Category
Perennials
Water Requirements
Average Water Needs; Water regularly; do not overwater
Foliage Color
Bronze
Blue-Green
Where to Grow
Bloom Characteristics
Bloom Size
Other details
Soil pH requirements
6.6 to 7.5 (neutral)
7.6 to 7.8 (mildly alkaline)
Patent Information
Propagation Methods
From seed; direct sow outdoors in fall
Direct sow as soon as the ground can be worked
From seed; sow indoors before last frost
Seed Collecting
Allow seedheads to dry on plants; remove and collect seeds
Regional

This plant is said to grow outdoors in the following regions:

Arroyo Grande, California

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Gardener's Notes:

2
positives
1
neutral
0
negative
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D
Prescott, AZ (Zone 7b) | August 2012 | positive

I picked this poppy plant up at Annie's last year. I have it planted on a hot hillside and it faired well this Summer growing a number o...Read More

C
(Zone 9b) | March 2006 | positive

The name of the genus comes from greek glaucòs = green-light blue and for the species flavum = yellow which are the plant's and flower's...Read More

G
(Zone 5a) | February 2006 | neutral

Stunning silvery undulating foliage rosettes, long branches of orange-yellow flowers followed by 3-6" narrow seed-producing horns.

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