Plains coreopsis is native to the south-central US but has naturalized across most of North America, and it is easy to understand why it travels. An annual that germinates, blooms, seeds, and dies in a single season, it requires almost nothing: dry, light soil, full sun, and no supplemental water once established. It is completely at ease on roadsides, in waste ground, and in dry fields where little else bothers to grow. The flowers are small but produced in such quantity that a mass planting becomes a sustained spectacle from summer until frost.

Unlike the golden yellows of most Coreopsis species, the tinctoria blooms run toward copper, mahogany, and dark-banded combinations — the species name references its use as a dye plant. It asks only for good drainage; standing water will finish it quickly. Deadheading prevents excessive self-seeding and keeps new blooms coming, but in open ground where spreading is welcome, leaving seed heads up costs nothing. It does best when crowded, making it well-suited to mass plantings, cutting gardens, and dry sunny slopes where watering is impractical.