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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.
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: 
2002 May 4 to 2002 Jul 232003 Jun 13 to 2003 Jul 42004 Jul 29 to 2004 Nov 122005 May 19 to 2005 Nov 82006 May 19 to 2006 Oct 272007 May 15 to 2007 Sep 282008 May 2 to 2008 Jun 242008 Aug 29 to 2008 Oct 132009 May 11 to 2009 Jul 102010 Jun 18 to 2010 Sep 142011 May 17 to 2011 Jul 72012 May 3 to 2012 Jun 222013 May 15 to 2013 Jul 12014 May 12 to 2014 Jul 42015 May 11 to 2015 Jul 282016 Jun 3 to 2016 Jul 28
Visit Monticello’s Online Shop to check for seeds or plants of Yellow-horned Poppy.

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