Mt Cuba Center
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Trial Garden

Coreopsis grandiflora ‘Rising Sun’

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Coreopsis grandiflora ‘Rising Sun’ had one of the most impressive floral displays during the first year, lasting all summer instead of just a few weeks like most of the other C. grandiflora cultivars. However, when the plants returned the following year, they had single rather than semi-double flowers. In 2013, ‘Rising Sun’ suffered from downy mildew and powdery mildew, likely causing the deaths of the entire group.


  • Rating
    Did not complete trial 
  • Common Name
    Rising Sun large flower tickseed  
  • Bloom Period
    mid-June – mid-July 
  • Flower Size
    1½” diameter 
  • Size
    10” x 14” (h x w) 
  • Weeks in Bloom
  • Disease Resistance
    Prone to downy mildew and powdery mildew