do I have to cut Coreopsis grandifl"early sunrise" down to the grown when flowers have finsished for the winter
By Dee69
London,
United Kingdom 
do I have to cut Coreopsis grandifl"early sunrise" down to the grown when flowers have finsished for the winter
On plant
Coreopsis grandiflora
2 Nov, 2010
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I wouldn't - this plant may die over winter, so leaving on the dead growth from this year should help to protect it. Remove dead material next Spring, as growth begins.
2 Nov, 2010