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Four O'Clock

Mirabilis jalapa
In July of 1767 Jefferson observed the blooms of his Four O'clocks: "Mirabilis just opened, very clever." In 1811 he noted planting seed sent by André Thouin of the Parisian Jardin des Plantes in an oval flower bed at Monticello. Four O'clocks are cherished for the simple miracle of the flowers, which only open during low light periods. Although now somewhat fallen from favor, these annuals, which grow to two or three feet, create a stunning effect in the evening, and on cloudy days when planted in large groupings. 
Visit Monticello’s Online Shop to check for seeds or plants of Four O'Clock.
Growth Type: 
Perennial
Color(s): 
red, purple, white, yellow
Hardiness Zones: 
Zone 1, Zone 2, Zone 3, Zone 4, Zone 5, Zone 6, Zone 7, Zone 8, Zone 9, Zone 10
Location at Monticello: 
West Lawn
Planting Conditions: 
Full Sun
Blooming History: 
July 7, 2001 to October 19, 2001June 14, 2002 to October 11, 2002July 4, 2003 to October 17, 2003June 16, 2004 to October 26, 2004July 20, 2005 to October 25, 2005July 11, 2006 to October 11, 2006June 25, 2007 to October 12, 2007July 11, 2008 to October 31, 2008July 10, 2009 to November 3, 2009August 1, 2010 to November 1, 2010June 28, 2011 to October 13, 2011June 22, 2012 to October 24, 2012June 28, 2013 to September 28, 2013June 24, 2014 to November 21, 2014June 15, 2015 to October 1, 2015June 17, 2016 to October 14, 2016June 30, 2017 to November 3, 2017June 20, 2018 to October 17, 2018

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