Coreopsis verticilata. Tickseed.

Coreopsis of this species have fine foliage and single flowers that grow on stalks 30-50cm in height. Zagreb is the densest of the three and will resemble a small shrub in summer. Prefers well drained soil and full sun, but will tolerate some shade.

Moonbeam: soft yellow
Sienna Sunset: warm apricot and burnt sienna
Zagreb: bright yellow

Summer bloom
1 gallon pot