Removing faded flower stalks prolongs bloom time. Space plants 15 in. Coreopsis are excellent as edging in flower beds or in rough open areas. Their summer flowers contrast well with the blues and purples of salvia. Plant coreopsis in full sun and well-drained soil and water them moderately.
Coreopsis tend to self-sow.
Space plants 12 in. It grows in a spreading, loosely mounded form 9 in. Its long bloom period is heaviest in spring, and the 2-in. Among the numerous varieties are 'Album,' with white flowers, and G. s. striatum , a lower-growing form with pale pink flowers veined with red. Cranesbill works well as an edging, in front of borders and in casual plantings.