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Helianthus annus

While Jefferson took great interest in plants, such as sesame and olive trees, that produced useful oils, there is no indication that he recognized such a benefit in the Sunflower. His listing of it as one of the "Hardy perennial flowers" sown at Monticello in September 1771, seems to show that he grew it for its large and striking flower, a quality that keeps it in ornamental gardens today.

Growth Type: 
Hardiness Zones: 
Zone 6, Zone 7, Zone 8, Zone 9, Zone 10
Location at Monticello: 
Vegetable Garden
Planting Conditions: 
Full Sun
Blooming History: 
2001 Jul 12 to 2001 Aug 172002 Jul 19 to 2002 Aug 162003 Jul 17 to 2003 Aug 22003 Sep 13 to 2003 Sep 262009 Aug 25 to 2009 Oct 142010 Jun 28 to 2010 Sep 12013 Sep 3 to 2013 Oct 32014 Jul 2 to 2014 Sep 122015 Jun 15 to 2015 Sep 3
Visit Monticello’s Online Shop to check for seeds or plants of Sunflower.


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