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Yellow-horned Poppy

Glaucium flavum
An Old World native, Yellow-horned Poppy was observed naturalized along the New England coast as early as the seventeenth century. Thomas Jefferson planted seeds at Monticello in an oval bed southeast of the house in 1807. This unusual biennial, sometimes a perennial, has curious yellow flowers and strange "horned" seed pods. It also has attractive bluish-gray, or glaucous, leaves that are most ornamental.
Visit Monticello’s Online Shop to check for seeds or plants of Yellow-horned Poppy.
Growth Type: 
Biennial
Color(s): 
Yello
Hardiness Zones: 
Zone 4, Zone 5, Zone 6, Zone 7, Zone 8
Location at Monticello: 
West Lawn
Planting Conditions: 
Full Sun
Blooming History: 
May 4, 2002 to July 23, 2002June 13, 2003 to July 4, 2003July 29, 2004 to November 12, 2004May 19, 2005 to November 8, 2005May 19, 2006 to October 27, 2006May 15, 2007 to September 28, 2007May 2, 2008 to June 24, 2008August 29, 2008 to October 13, 2008May 11, 2009 to July 10, 2009June 18, 2010 to September 14, 2010May 17, 2011 to July 7, 2011May 3, 2012 to June 22, 2012May 15, 2013 to July 1, 2013May 12, 2014 to July 4, 2014May 11, 2015 to July 28, 2015June 3, 2016 to July 28, 2016May 18, 2017 to November 3, 2017May 30, 2018 to August 9, 2018May 8, 2019

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