You'll probably find selections of Coreopsis grandiflora and those that are hybrids between it and Coreopsis lanceolata. Both are great natives to North America and offering brilliant golden ...

The most commonly grown species is known as large-flowered tickseed (Coreopsis grandiflora). Coreopsis gets its common name from the shape of its seeds. Koris means “bug” in Greek and opsis ...

Another popular variety is Coreopsis grandiflora “Early Sunrise,” with golden yellow, semi-double blooms that cover the plant from early summer into fall. This cultivar is easy to start from ...

It may rebloom, but be careful — buds and seedheads look similar. • Tickseed (Coreopsis grandiflora). Deadhead frequently to keep it flowering all summer; cut flower stems back to side branches.