Yellow Hornpoppy

Glaucium flavum

GLAH-see-um FLA-vum
18 to 24 in.
18 to 24 in.

low

orange-yellow

June to July

18 to 24 in.

18 to 24 in.

No

mediterranean and Asia

sun

USDA zones 4-9

hardy to 7,500 ft.

Yellow horned poppy is a drought-tolerant perennial flower grown for its scalloped blue-green leaves and yellow flowers.

The leaves grow as a rosette of long leaves with undulating edges. In summer, it produces papery orange-yellow flowers followed by narrow, horn-like seed pods.

low

orange-yellow

June to July

18 to 24 in.

18 to 24 in.

No

mediterranean and Asia

sun

USDA zones 4-9

hardy to 7,500 ft.

In some areas of the United States, it has spread into natural areas and disturbed native vegetation. This has not been the case at the Xeriscape Garden; it hasn't spread much by seed. The flowers are pretty and the leaves are an interesting shape and blue color.

Cut leaves to ground level before new growth starts in spring. Cut off old flower stalks after blooming.

The leaves may need to be cut back in mid summer as well if they get too large, floppy and brown. A new, smaller rosette will grow and last through the rest of the growing season.