Sienna Sunset Coreopsis - Very Hardy - Quart Pot Coreopsis verticillata 'Sienna Sunset' PP#20,470 Hardy Zones: 4-9, Mature Height: 16-20" Pastel shade of orange, then gradually mature to apricot with hints of salmon Bloom Time: Early Summer to Early Fall Immediate shipping in one quart pot. Dormant shipping in winter.